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Label  
    Automated printing by scale to .........  705 / 414
    Measure cost by weight .................  705 / 414
    Clothing label .........................  D05 / 63+
    Design .................................  D20 / 22+
    Exhibiting .............................  283 / 81+
    Gumming apparatus ......................  118
        And applying .......................  156
        Dynamic information storage ........  360
        And retrieral ......................  360
    Identifying plug tobacco ...............  131 / 368
    Label or tape embossing tool ...........  D18 / 19+
    Labels .................................  283 / 81+
        Magnetic bubbles ...................  365 / 1+
        Read only memories .................  365 / 97+
        Static information storage .........  365
        And retrieral ......................  365
    Obliterating stamp scarifier ...........  81 / 9.21
    X-art ..................................  493 / 961*
Labeling (See Digests 1-51) ................  156
    Cigarette packaging machine ............  131 / 281+
    Fabrics or deformable surfaces .........  156 / DIG 19
    Feeding ................................  156 / DIG 28
    Flat rigid surfaces ....................  156 / DIG 1
    Magazines ..............................  156 / DIG 29
    Manual dispenser .......................  156 / DIG 48
    Non-flat surfaces ......................  156 / DIG 5
    Plug tobacco ...........................  131 / 113+
    Tobacco products .......................  131 / 106
Laboratory Apparatus .......................  422 / 99+
    Burettes ...............................  422 / 100
    Cabinet ................................  312 / 209
    Elements ...............................  422 / 99+
    Laboratory equipment ...................  D24 / 232+
    Monitor nuclear ........................  250 / 472.1
        Scintillation type .................  250 / 483.1
Labyrinth ..................................  472 / 62
    Memory systems  
        Dynamic electric information .......  369
        Storage and retrival ...............  369
        Dynamic magnetic information .......  360
        Storage and retrival ...............  360
    Seal for a joint or juncture ...........  277 / 412+
Lace  
    Digest art .............................  D05 / 47+
    Table cloth ............................  D06 / 617+
    Tipping ................................  425 / 807*
Laces and Lacings  
    Belt end connectors ....................  24 / 34
    Belt operated corset closure ...........  450 / 119
    Design,narrow ..........................  D05 / 11+
    Garment supports .......................  2 / 326+
    Knot or end holders ....................  24 / 712.1+
    Lacing and unlacing machines ...........  12 / 58.5
    Lacing device ..........................  24 / 712+
    Making .................................  87
        Fiber destruction by chemicals .....  8 / 114.6
    Packages for ...........................  206 / 49
    Sewing machine for lacing or ...........  112 / 470.21+
    Whipping ...............................  112 / 470.21+
    Shoe lacing machine ....................  12 / 58.5
    Shoelace fasteners .....................  24 / 712.2+
    Shoelaces ..............................  24 / 715.4+
        Design .............................  D02 / 978
    Stud making ............................  29 / 12
    Stud setting machine ...................  227 / 51+
    Tipping ................................  72 / 282
Lacquer (See Varnish)  
    Cellulose ether or ester ...............  106 / 172.1+
    Cellulose ether or ester ...............  106 / 168.01+
    (See also synthetic resin or ...........  106 / 168.01+
    Natural rubber compositions) ...........  106 / 168.01+
    Synthetic resin or natural rubber  
    (See class 523, 524))  
Lacrosse ...................................  473 / 415+
    Stick ..................................  473 / 513
Lactams  
    Caprolactam ............................  540 / 485+
    Delta lactams ..........................  546 / 243
    Eg alpha piperidone ....................  546 / 243
    Gamma lactams, eg alpha pyrrolidine ....  548 / 543+
    Isatins ................................  548 / 485
    Naphthostyrils .........................  548 / 437
Lactic Acid ................................  562 / 589
    Preparation from carbohydrates .........  562 / 515
        Fermentation .......................  435 / 139
Lactide ....................................  549 / 274
Lactometer .................................  73 / 32 R+
Lactones ...................................  549 / 263+
    Poly hetero o  
        5 Membered ring ....................  549 / 296
        6 Membered ring ....................  549 / 274
        7 Membered ring ....................  549 / 267
Lactose ....................................  127 / 31
Ladders ....................................  182 / 194
    Attached supports ......................  248 / 210
    Bracket attachments ....................  248 / 210+
        Scaffold or shelf type .............  248 / 238
    Chute or escape combined ...............  182 / 49
    Collapsible ............................  182 / 156+
    Convertible ............................  182 / 21+
        To chair ...........................  182 / 33+
        To scaffold ........................  182 / 27
    Design .................................  D25 / 62+
    Door combined ..........................  182 / 77+
    Elevating platform .....................  182 / 101+
    Extension ..............................  182 / 207+
    Fire trucks ............................  280 / 4
    Hose or nozzle support .................  248 / 76
        Attached ...........................  248 / 77+
    Land vehicle ...........................  182 / 127
    Platform detachable ....................  182 / 120+
    Propped ................................  182 / 165+
    Safety devices for .....................  182 / 107+
    Scaffold support .......................  182 / 116+
    Self sustaining ........................  182 / 180.1+
    Sleeping car ...........................  105 / 326
    Wall or floor attached .................  182 / 93+
Ladles .....................................  141 / 110
    Glass handling .........................  65 / 324+
    Hoist traversing .......................  212 / 335
    Kitchen ................................  30 / 324+
        Design .............................  D07 / 691
    Metal dispensing type ..................  222
        Molding device with ................  164 / 335+
Lagging  
    Reels ..................................  206 / 398+
Lake  
    Dye fixing with ........................  8
    Mordanting metal .......................  8
        Tannate combined ...................  8 / 596
    Pigments containing ....................  106 / 402
Laminate See Class 428 Glossary ............  428
    Abrasive tool  
        Flexible cylindrical ...............  451 / 490+
        Making .............................  51 / 297
        Rigid cylindrical ..................  451 / 541+
    Belt transmission ......................  474 / 237+
    Brushes rotary .........................  15 / 181
    Building constructions .................  52 / 408+
        Curvilinear ........................  52 / 267
    Building panel .........................  52 / 662
    Conductors insulated ...................  174 / 120 C+
    Electrode for electrolysis .............  204 / 290.01
    Glass ..................................  428 / 426+
        Making .............................  156 / 99+
    Hinges .................................  16 / 372
    Insoles ................................  36 / 44
    Making .................................  156
        Coating and stripping ..............  264
        Coating apparatus ..................  118
        Coating processes ..................  427
    Metallic ...............................  428 / 615+
    Nuclear fuel structures ................  376 / 416
    Panel fences ...........................  256 / 24+
    Pipe ...................................  138 / 140+
        Flexible ...........................  138 / 137+
    Pulleys ................................  474 / 166+
    Rail bonds .............................  238 / 14.1+
    Shoe parts .............................  12
        Sole leveling ......................  12 / 33+
    Soles ..................................  36 / 30 R
    Stencils ...............................  101 / 128.21
    Wipers, eg blackboard erasers ..........  15 / 223+
    Wood ...................................  144
Lampblack ..................................  423 / 445 R+
    Agglomerating ..........................  23 / 314
    Apparatus ..............................  422 / 150+
    Electrostatic field or electrical ......  204 / 173
    Discharge preparation ..................  204 / 173
Lamps (See Also Electrode)  
    Arc ....................................  313
    Barrel illumination ....................  362 / 154
    Bicycle ................................  362 / 473+
    Burner  
    Camera attached light ..................  D16 / 239+
    Candle in lantern ......................  362 / 161
    Candle simulating ......................  362 / 157+
    Carburetors for ........................  48 / 144+
    Chimney cleaners .......................  15 / 211+
    Chimneys ...............................  362 / 312+
    Consumable electrode type ..............  314
    Daylight illuminating fixture ..........  362 / 1
    Daylight lamp structure ................  313 / 110+
        Fluorescent material type ..........  313 / 486+
    Design .................................  D26
    Diagnostic .............................  600 / 249
    Dimmer structure .......................  323 / 905*
    Discharge device, energizing ...........  315
    Disinfecting, ultraviolet ..............  250 / 504 R+
    Dough raiser ...........................  126 / 282
    Egg candling  
        Box with lamp control ..............  356 / 67
        Lamp attachment ....................  356 / 68
    Electric ...............................  313
        Arc lamp ...........................  313 / 41
        Arc lamp electrode feeding .........  314
        Arc lamp gas or vapor ..............  313 / 567+
        Arc lamp mercury vapor .............  313 / 163+
        Automatic substitution of ..........  315 / 65
        Filament ...........................  315 / 65
        Circuit element in multiple ........  315 / 64
        Filament ...........................  315 / 64+
        Connectors for clusters of .........  439 / 638+
        Consumable electrode ...............  314
        Exhausting .........................  141 / 65
        Filament compositions ..............  252 / 500+
        Filament for gas or vapor lamps ....  313 / 341+
        Filament shapes ....................  313 / 341+
        Gas filling ........................  141 / 66
        Gas or vapor .......................  313 / 567+
        Glassworking apparatus for .........  65 / 152
        Making .............................  65 / 152+
        Glassworking processes for .........  65 / 36
        Making .............................  65 / 36+
        Glow discharge .....................  313 / 567+
        Incandescent bulb manufacturing ....  445 / 27
        Mercury vapor ......................  313 / 567+
        Multiple filament ..................  313 / 316
        Nernst .............................  313 / 14
        Portable self contained ............  362 / 157+
        Reflector built in .................  313 / 113+
        Repair apparatus ...................  445 / 61
        Repair processes ...................  445 / 2
        Sockets ............................  439
        Sockets rheostat combined ..........  338 / 70+
        Space discharge device .............  445
        Manufacturing ......................  445
        Systems of supply for ..............  315
    Electrophotographic copier .............  399 / 177+
    Extinguishing devices ..................  431 / 144+
    Flashlight .............................  362 / 208+
        Camera shutter synchronized ........  396 / 180+
        Photographic type ..................  431 / 358+
    Globe or bowl ..........................  D26 / 118+
    Heater attachment ......................  126 / 255+
        Tool ...............................  126 / 235
    Heating with electric ..................  219 / 552+
    Illuminated  
        Sign attachment ....................  40 / 553+
        Sign lamp box ......................  40 / 564+
    Incandescent ...........................  D26 / 2+
    Inspection .............................  362 / 138
    Magnesium ..............................  431 / 99
    Miners .................................  362 / 164+
    Nonwired supply  
        High frequency field ...............  315 / 248
        Induction type .....................  315 / 248
        Radio ..............................  315 / 149+
        Transformer in lamp ................  315 / 57
    Ornamental bulb ........................  220 / 2.1 R+
        Fluorescent ........................  313 / 493
        Gas or vapor .......................  313 / 567+
        Reflector ..........................  313 / 113+
        Sign ...............................  40 / 541+
    Photographic lighting ..................  362 / 3+
    Photographic safe lamp .................  362 / 803*
    Pole  
        Decorative element .................  52 / 301
    Post combined with .....................  D26 / 67+
    Shades .................................  362 / 351+
        Design .............................  D26 / 118+
        Making .............................  493 / 950*
        Rotating ...........................  362 / 35
    Signal lamp, horn combined .............  116 / 3
    Signaling devices having ...............  340
        Design .............................  D10 / 111+
        Socket .............................  D13 / 134
    Stands .................................  362 / 382+
    Switchboard ............................  379 / 315+
        Testing of .........................  379 / 20
    Therapeutic ............................  607 / 91+
    Tool heater combined ...................  126 / 241
    Vehicle ................................  362 / 459+
    Wick trimmers ..........................  431 / 120
    Wick type for liquid heater ............  126 / 358.1
    Wicks ..................................  431 / 325
Lampworking  
    Glass manufacturing ....................  65
Lances  
    Bomb ...................................  102 / 371
    Fishing ................................  43 / 6
    Metallurgical ..........................  266 / 225+
Lancet .....................................  606 / 181+
Land  
    Anchors ................................  52 / 155+
    Markers for plows ......................  172 / 126+
    Rollers ................................  404 / 122+
Land Vehicle See Specific Types ............  280
    Air bags ...............................  280 / 728.1+
    Amphibious boats  
        Airborne ...........................  244 / 50
        Vertically adjustable wheels .......  280 / 43+
    Animal draft appliances ................  278
    Attachments ............................  280 / 727+
    Auxiliary article compartments  
        Add-on debris carrier ..............  224 / 400+
        Built-in general ...................  296 / 37.1+
    Bodies and tops ........................  296
        On & off freight container .........  410 / 52+
    Dumping ................................  298
    Mechanical manufacturing ...............  29 / 592+
    Motor driven ...........................  180
    Passenger safety guards ................  280 / 748+
    Seat belts .............................  280 / 801.1+
    Spare tire compartment .................  296 / 37.2
    Stub axles .............................  280 / 124.125+
    Tires and wheels resilient .............  152
    Toilets ................................  4 / 458+
    Vertically adjustable wheels ...........  280 / 43+
    Wheel substitutes ......................  305
    Wheels and axles .......................  301
    Xr-collection ..........................  224 / 928*
Landfill ...................................  405 / 129.1+
Landing Devices  
    Aircraft  
        Carriers ...........................  114 / 261
        Fields .............................  244 / 114 R
        Landing gear .......................  244 / 100 R+
        Retarding and restraining ..........  244 / 110 R+
    Elevator stop ..........................  187 / 283+
        Car supporting .....................  187 / 357
    Field or platform, floating  
        Illumination .......................  362 / 145+
        Mats ...............................  404 / 35+
        Mooring ............................  244 / 114 R+
        Searchlight ........................  362 / 145+
    Moving train ...........................  104 / 19
Language Teaching ..........................  434 / 156
    Forms ..................................  283 / 46
        Writing ............................  283 / 45
    Laboratory .............................  434 / 157
    Laboratory .............................  434 / 319+
Lanolin ....................................  552 / 544
    Purification ...........................  552 / 545+
    Recovery from wash liquors .............  552 / 545
Lantern  
    Design .................................  D26 / 37+
    Electric ...............................  362 / 261
        Flashlight .........................  362 / 208
    Hand lantern support on vehicle ........  362 / 474+
    Heated dinner bucket and ...............  126 / 267
    Heater and .............................  126 / 209
    Ornamental .............................  362 / 806*
        Slides .............................  40 / 701+
    Storm ..................................  362 / 159+
Lap Robe ...................................  2 / 46+
    Holder vehicle body combined ...........  280 / 288.4+
Lapidary Work ..............................  125 / 30.01
Lapped Surfacing See  
    Facer construction  
Lappet Looms ...............................  139 / 49
Lapping Abrading ...........................  216 / 88
    Compositions ...........................  51 / 293+
    Rigid tool .............................  451 / 540+
    Without tool ...........................  451 / 114+
Lapping,Chemical ...........................  216 / 88
    Wheeled vehicle combined ...............  280 / 288.4+
Lard  
    Rendering ..............................  554 / 8+
    Substitutes ............................  426 / 601+
Larding Pins ...............................  99 / 494
Lariats ....................................  119 / 802+
    Amusement type .........................  446 / 247
Larner Johnson Type Internal ...............  137 / 219+
    Hydraulic valves .......................  137 / 219+
Laryngoscopes ..............................  600 / 185+
Larynx, Artificial .........................  623 / 9
Larynx, Electric ...........................  381 / 70
Laser ......................................  372
    Ablating ...............................  219 / 121.6+
    Amplifiers .............................  359 / 333+
    Beam ...................................  430 / 945*
        Applications, oscillators  
    Communication system ...................  398 / 1+
    Instruments with .......................  33 / DIG 21
    Laser assisted diffusion of ............  438 / 535
    Impurities into semi. substrates .......  438 / 535
    Laser induced vapor phase etching ......  216 / 65
    Oscillators  
    Printer  
        Beam recorder ......................  347 / 224+
        Electric photography ...............  347 / 129+
        Photocomposition ...................  396 / 549+
    Recrystallization ......................  117
    Semiconductor solid state ..............  372 / 43.01+
        Manufacture ........................  438 / 22+
    Used in reaction to prepare ............  204 / 157.41
    Inorganic compound .....................  204 / 157.41
    Used in reaction to prepare ............  204 / 157.61
    Organic compound .......................  204 / 157.61
    Used in reaction to prepare or .........  522 / 2
    Treat synthetic resin or ...............  522 / 2
    Natural rubber .........................  522 / 2
Lashes .....................................  231 / 4
Lashings  
    Boat ...................................  114 / 381
    Cargo on freight carrier ...............  410 / 96
        Freight car ........................  105 / 375
Lasso ......................................  119 / 802+
Lasting  
    Continental type machine ...............  12 / 10.7
Lasts  
    Darning ................................  223 / 100
    Delasting machines .....................  12 / 15.1
    Design .................................  D15 / 137
    Inserting machines .....................  12 / 15
    Machines for making ....................  12 / 7+
        Dash pots ..........................  12 / DIG 2
        Fluid actuated .....................  12 / DIG 1
        Nailing combined ...................  12 / 13.1+
        Sewing combined ....................  12 / 13.2+
    Processes for making ...................  12 / 145+
    Removing machines ......................  12 / 15.1
    Shoe ...................................  12 / 133 R+
    Tools ..................................  12 / 107 R+
    Vulcanizing boots and shoes ............  425 / 383
    Wire ...................................  12 / 7.9
Latch (See Lock)  
    Actuators for knitting machines ........  66 / 111+
    Bobbin .................................  112 / 188
    Closure fastener .......................  292
        Adjustable backset .................  292 / 1.5
    Closure operator combined ..............  49 / 279+
        Stove door .........................  126 / 197
    Design .................................  D08 / 331+
    Gate ...................................  D08 / 331+
    Hinge combined .........................  16 / 231
    Locks & other hardware .................  D08 / 330+
    Operated clutch ........................  192 / 22+
    Project retract pen ....................  401 / 99+
    Releaser closure fastener ..............  292 / 254+
    Switch combined ........................  200 / 318
    Trip ...................................  74 / 2+
Latent Image Formation  
    Electrophotographic copier .............  315 / 210+
Latex  
    Brassiere ..............................  450 / 36
    Girdle or corset .......................  450 / 97
    Synthetic rubber or natural rubber  
    Containing (class 523, 524)  
        Natural rubber latex  
            Coagulating ....................  528 / 936*
            Creaming .......................  528 / 937*
            Physical treating ..............  528 / 934*
            Preserving .....................  528 / 935*
Lath .......................................  52
    Holders ................................  144 / 288.5
    Imperforate ............................  52 / 443+
    Slat type ..............................  52 / 342+
Lather Forming  
    Foam making ............................  516 / 10+
    Gas and liquid contact .................  261
    Lather maker ...........................  366 / 604*
    Spray type .............................  239 / 343
Lathes .....................................  82 / 117+
    Abrading attachments for ...............  451 / 435+
    Boring horizontal ......................  408
    Centers ................................  82 / 151+
    Chucks .................................  279
    Cutoff .................................  82 / 46+
    Cutters and cutter holders for .........  407 / 66+
    Design .................................  D15 / 130
    Drill holder for .......................  408 / 238
    Lathe - type winding machine ...........  242 / 443+
    Milling attachments for ................  409 / 165
    Planing attachment for .................  409 / 328
    Punching attachment for ................  83
    Spinning and fusing sheet metal ........  228
    Stoneworking ...........................  368 / 10
    Straightening shafts in ................  72 / 380+
    Turret or capstan ......................  29 / 33 J+
    Watchmakers ............................  968 / 724+
    Winding elongated material for .........  242
    Wood saw feed ..........................  83 / 704+
    Wood slicer strip cutting feed .........  144 / 165+
    Wood turning ...........................  142
    Wood veneer lathes .....................  144 / 209.1+
Latrines ...................................  4 / 460+
Latrobes ...................................  126 / 523
Lattice ....................................  52 / 660+
    Frame for panels .......................  52 / 455+
    Nuclear fuel cores .....................  376 / 346
    Nuclear fuel cores .....................  376 / 267
    Type product  
        Static mold ........................  249 / 60
    Wire  
        Machines for making ................  140 / 25+
Launches ...................................  114
Launching  
    Aircraft ...............................  244 / 63
    Boat ...................................  114 / 365
    Life boat ..............................  114 / 365+
    Marine vessels .........................  405 / 1
    Torpedo ................................  114 / 238+
    Toy glider .............................  446 / 63+
    Toy rocket .............................  446 / 212
    Toy vehicle ............................  446 / 429+
Laundry  
    Apparatus ..............................  68
        Design .............................  D32 / 6+
    Bag ....................................  D32 / 36
        Net or mesh type for use in ........  383 / 117
        Washing ............................  383 / 117
    Bluing compositions ....................  8 / 648
    Combined washer-drier machine ..........  D32 / 5
    Dry cleaning machine ...................  D32 / 10+
    Drying .................................  34
        Combined washing ...................  68 / 19+
    Household equipment ....................  D32 / 35+
    Ironing ................................  38
    Machinery ..............................  D32 / 6+
    Methods ................................  8 / 137+
        Manipulative .......................  8 / 147+
    Sorting ................................  209 / 937*
    Sticks .................................  294 / 23.5
    Tongs ..................................  294 / 8.5
Lauric Acid ................................  554 / 1+
Laurolactam ................................  540 / 451+
Lauryl Alcohol .............................  568 / 840
    Production from coconut acids ..........  568 / 876+
Lavatory ...................................  4 / 650+
    Basin supports .........................  4 / 643+
    Building wall attached .................  52 / 34+
    Lavatory ...............................  D23 / 284+
    Soap dish with .........................  206 / 77.1
    Soap handling means ....................  206 / 77.1
Law Enforcement Computer Applications  
    Artificial intelligence ................  706 / 933*
Lawn  
    Aerator ................................  172 / 21+
    Grass ..................................  PLT / 388+
    Mower (see harvester) .................  56 / 229+
        Bar handle hardware ................  16 / 437
        Circumferentially spaced blade .....  172 / 552
        Design .............................  D15 / 14+
        Disc type ..........................  56 / 255+
        Motor operated .....................  56 / 16.7+
        Mower-type tongue & crossbar .......  16 / DIG 38
        Reel type ..........................  56 / 249+
        Sharpener ..........................  76 / 82.1
        Sharpener abrading in situ .........  451 / 419+
        Small engine starters ..............  123 / 179.26
        Snowplow combined ..................  37 / 243
        Tool driven, laterally extended ....  172 / 121
        Bar or blade .......................  172 / 121
    Rakes ..................................  56 / 400.01+
    Roller .................................  404 / 122+
    Sprinkler ..............................  D23 / 214+
    Sweeper ................................  D15 / 27
    Swings .................................  297 / 245+
    Trimmers ...............................  172 / 13+
Laxative ...................................  424
Layers (See Composition; Sheet)  
    Bonded .................................  428
    Electroplating .........................  205 / 170+
    Explosive or thermic ...................  149 / 14+
    Composition containing .................  149 / 14+
    Filling of articles ....................  53 / 531+
    Filter .................................  210 / 290
    Filter screen gas separation ...........  55 / 486+
    Layering ...............................  47 / 5.5
    Nuclear fuel structures ................  376 / 432
    Railway track ..........................  104 / 2+
    Shoe sole machine ......................  12 / 29
    Signs multiple .........................  40 / 615
    Static mold having .....................  249 / 116
    Super-imposed metal ....................  249 / 116
    Structurally defined ...................  428 / 98+
        Metallic ...........................  428 / 615+
    Winding of bobbins .....................  242 / 476.7+
Laying  
    Building facings or shingles ...........  52 / 748.1+
    Mines ..................................  102 / 411+
    Paving blocks ..........................  404 / 99
    Pipe or cable ..........................  405 / 154.1+
    Shoe machine for .......................  12 / 33+
Layout Device  
    Clothes ................................  33 / 11+
    Shoes ..................................  33 / 4+
Lays Loom ..................................  139 / 188 R+
Lazy Susan .................................  D07 / 501
Lazy Tongs  
    Bracket ................................  248 / 277.1
    Collapsible supports ...................  211 / 202
    Drawbridge .............................  14 / 45
    Elevator drive .........................  187 / 269
    Extension ladder .......................  182 / 157+
    Fire escape ............................  182 / 40
    Linkage system .........................  74 / 521
    Mast or tower ..........................  52 / 109
    Pushing and pulling elements ...........  254 / 122
    Vehicle fender .........................  293 / 27
    Window operators .......................  49 / 363
Leaching (See Diffusing; Extracting)  
    Apparatus ..............................  422 / 261+
        Electrolytic cell combined .........  204 / 233+
        Metallurgical ......................  266 / 101
        Sugar starch carbohydrates .........  127 / 3+
    Processes  
        Adsorbent reactivation .............  502 / 20+
        Adsorbent reactivation .............  502 / 22
        Water only .........................  502 / 22
        Hydrometallurgy ....................  75 / 711+
        Inorganic compounds ................  423 / 210+
Lead (See Pencil)  
    Acetate ................................  556 / 105
    Alloys .................................  420 / 563
        Copper .............................  420 / 491
        Copper tin .........................  420 / 474