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U.S. PATENT AND TRADEMARK OFFICE
Electronic Information Products Division
Patent Technology Monitoring Branch (PTMB)

Patenting By Geographic Region (State and Country),
Breakout By Technology Class

Count of 2001 - 2005 Utility Patent Grants,
By Calendar Year of Grant

- Explanation of Data -

Rank Ordered Listing of Technology Classes Receiving 1 or More Utility Patents During the Period
Originating From

MINNESOTA

( patent origin is determined by the residence of the first-named inventor )
( technology class is determined by the primary classification assigned to the patent- see 'Explanation of Data' )

The following table displays technology classes and counts of associated patents, as distributed by the year of patent grant
Class Class Title 2001 2002 2003 2004 2005 Total
128 Surgery (includes Class 600) 143 141 165 103 91 643
607 Surgery: Light, Thermal, and Electrical Application 124 132 127 113 130 626
360 Dynamic Magnetic Information Storage or Retrieval 97 124 126 163 75 585
428 Stock Material or Miscellaneous Articles 92 102 102 96 91 483
424 Drug, Bio-Affecting and Body Treating Compositions (includes Class 514) 78 104 84 71 38 375
604 Surgery (Medicators and Receptors) 76 59 101 70 45 351
520 Synthetic Resins or Natural Rubbers (includes Classes 520-528) 63 81 79 67 44 334
606 Surgery (instruments) 57 54 84 68 50 313
623 Prosthesis (i.e., Artificial Body Members), Parts Thereof, or Aids and Accessories Therefor 71 70 53 54 36 284
073 Measuring and Testing 31 33 82 44 47 237
711 Memory (Electrical Computers and Digital Processing Systems) 46 47 31 47 48 219
385 Optical Waveguides 19 34 43 46 47 189
426 Food or Edible Material: Processes, Compositions, and Products 40 36 47 33 19 175
707 DP: Database and File Management or Data Structures (Data Processing) 29 31 30 40 40 170
710 Input/Output (Electrical Computers and Digital Processing Systems) 40 37 41 28 21 167
324 Electricity: Measuring and Testing 22 36 47 27 24 156
340 Communications: Electrical 25 28 30 31 36 150
156 Adhesive Bonding and Miscellaneous Chemical Manufacture 36 34 34 24 19 147
439 Electrical Connectors 18 26 32 32 38 146
800 Multicellular Living Organisms and Unmodified Parts Thereof and Related Processes 34 11 13 47 38 143
430 Radiation Imagery Chemistry: Process, Composition, or Product Thereof 27 35 27 27 25 141
359 Optics: Systems and Elements 24 27 32 25 24 132
427 Coating Processes 26 30 23 30 17 126
435 Chemistry: Molecular Biology and Microbiology 26 28 33 20 17 124
702 DP: Measuring, Calibrating, or Testing (Data Processing) 9 20 35 29 30 123
264 Plastic and Nonmetallic Article Shaping or Treating: Processes 20 19 29 35 19 122
714 Error Detection/Correction and Fault Detection/Recovery 19 21 26 32 24 122
361 Electricity: Electrical Systems and Devices 16 28 29 24 23 120
029 Metal Working 26 21 23 26 19 115
709 Multicomputer Data Transferring (Electrical Computers and Digital Processing Systems) 22 18 19 32 24 115
532 Organic Compounds (includes Classes 532-570) 25 30 18 19 20 112
510 Cleaning Compositions for Solid Surfaces, Auxiliary Compositions Therefor, or Processes of Preparing the Compositions 27 32 25 16 11 111
451 Abrading 18 18 25 29 20 110
206 Special Receptacle or Package 24 15 17 17 35 108
052 Static Structures (e.g., Buildings) 22 11 23 23 24 103
715 DP: Presentation Processing of Document, Operator Interface Processing, and Screen Saver Display Processing (Data Processing) 25 20 17 15 21 98
210 Liquid Purification or Separation 21 21 26 10 17 95
280 Land Vehicles 19 25 11 18 16 89
137 Fluid Handling 29 16 12 15 13 85
717 DP: Software Development, Installation, and Management (Data Processing) 22 14 14 15 20 85
356 Optics: Measuring and Testing 9 13 25 22 14 83
700 DP: Generic Control Systems or Specific Applications (Data Processing) 8 13 21 28 13 83
438 Semiconductor Device Manufacturing: Process 17 10 19 19 16 81
257 Active Solid-State Devices (e.g., Transistors, Solid-State Diodes) 8 13 20 19 20 80
365 Static Information Storage and Retrieval 12 13 14 16 22 77
602 Surgery: Splint, Brace, or Bandage 20 15 19 6 16 76
062 Refrigeration 14 19 24 12 6 75
250 Radiant Energy 14 10 25 10 15 74
327 Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems 24 9 18 13 10 74
362 Illumination 13 14 16 12 18 73
248 Supports (e.g., for holding articles, etc.) 9 15 27 8 11 70
370 Multiplex Communications 14 13 16 13 12 68
219 Electric Heating 12 13 13 14 13 65
043 Fishing, Trapping, and Vermin Destroying 7 17 15 8 12 59
347 Incremental Printing of Symbolic Information 8 12 11 19 9 59
701 DP: Vehicles, Navigation, and Relative Location (Data Processing) 7 12 17 13 10 59
174 Electricity: Conductors and Insulators 11 10 14 12 11 58
055 Gas Separation 10 12 11 9 14 56
180 Motor Vehicles 9 14 6 8 19 56
345 Computer Graphics Processing and Selective Visual Display Systems 12 12 9 11 11 55
095 Gas Separation: Processes 9 13 12 12 8 54
382 Image Analysis 6 8 13 15 12 54
422 Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing 8 9 12 16 9 54
414 Material or Article Handling 9 11 10 10 11 51
134 Cleaning and Liquid Contact with Solids 12 13 12 7 6 50
713 Support (Electrical Computers and Digital Processing Systems) 8 11 8 6 17 50
326 Electronic Digital Logic Circuitry 16 14 5 6 8 49
716 DP: Design and Analysis of Circuit or Semiconductor Mask (Data Processing) 10 7 10 15 7 49
222 Dispensing (apparatus and process) 10 11 9 10 8 48
051 Abrasive Tool Making Process, Material, or Composition 14 7 13 8 5 47
015 Brushing, Scrubbing, and General Cleaning 12 9 9 7 8 45
342 Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation) 9 4 5 17 10 45
425 Plastic Article or Earthenware Shaping or Treating: Apparatus 13 7 4 12 9 45
417 Pumps 10 8 8 10 7 43
473 Games Using Tangible Projectile 9 5 11 6 12 43
429 Chemistry: Electrical Current Producing Apparatus, Product, and Process 14 10 7 5 6 42
239 Fluid Sprinkling, Spraying, and Diffusing 4 6 13 9 9 41
002 Apparel 14 11 4 5 6 40
040 Card, Picture, or Sign Exhibiting 6 9 12 8 4 39
211 Supports: Racks 7 11 7 10 4 39
235 Registers (e.g., cash registers, calculators, devices for counting movements of devices, etc.) 5 6 6 12 9 38
114 Ships 5 4 3 9 16 37
119 Animal Husbandry 5 11 5 7 9 37
375 Pulse or Digital Communications 7 6 11 6 7 37
379 Telephonic Communications 3 5 9 13 7 37
033 Geometrical Instruments 9 9 6 4 8 36
405 Hydraulic and Earth Engineering 7 3 12 5 9 36
404 Road Structure, Process, or Apparatus 4 5 7 9 10 35
436 Chemistry: Analytical and Immunological Testing 3 8 5 10 9 35
318 Electricity: Motive Power Systems 6 5 6 4 13 34
482 Exercise Devices 10 11 4 4 5 34
252 Compositions 6 8 7 5 7 33
705 DP: Financial, Business Practice, Management, or Cost/Price Determination (Data Processing) 4 7 6 5 11 33
053 Package Making 8 8 5 4 7 32
096 Gas Separation: Apparatus 7 12 7 3 3 32
372 Coherent Light Generators 1 0 7 10 14 32
455 Telecommunications 3 6 5 8 10 32
123 Internal-Combustion Engines 9 6 5 3 8 31
141 Fluent Material Handling, with Receiver or Receiver Coacting Means 8 8 7 4 4 31
242 Winding, Tensioning, or Guiding 8 8 6 6 3 31
310 Electrical Generator or Motor Structure 10 4 6 4 7 31
358 Facsimile and Static Presentation Processing 4 6 11 3 6 30
198 Conveyors: Power-Driven 9 6 5 4 5 29
200 Electricity: Circuit Makers and Breakers 2 7 6 9 5 29
005 Beds 2 11 3 5 7 28
024 Buckles, Buttons, Clasps, Etc. 5 6 6 6 5 28
118 Coating Apparatus 5 4 9 5 5 28
220 Receptacles 4 6 7 6 5 28
297 Chairs and Seats 4 6 3 9 6 28
369 Dynamic Information Storage or Retrieval 9 6 8 4 1 28
400 Typewriting Machines 5 10 2 5 5 27
718 Virtual Machine Task or Process Management or Task Management/Control (Electrical Computers and Digital Processing Systems) 5 2 4 13 3 27
381 Electrical Audio Signal Processing Systems and Devices 3 8 4 10 1 26
433 Dentistry 11 3 5 3 3 25
719 Interprogram Communication or Interprocess Communication (Ipc) (Electrical Computers and Digital Processing Systems) 6 4 2 7 6 25
083 Cutting 10 3 6 4 1 24
182 Fire Escape, Ladder, or Scaffold 6 3 2 6 7 24
056 Harvesters 1 10 3 5 4 23
126 Stoves and Furnaces 5 4 5 6 3 23
331 Oscillators 6 4 6 4 3 23
601 Surgery: Kinesitherapy 5 4 3 5 6 23
296 Land Vehicles: Bodies and Tops 3 5 6 4 4 22
341 Coded Data Generation or Conversion 5 8 2 2 5 22
102 Ammunition and Explosives 8 1 7 3 2 21
273 Amusement Devices: Games 5 7 2 4 3 21
508 Solid Anti-Friction Devices, Materials Therefor, Lubricant or Separant Compositions for Moving Solid Surfaces, and Miscellaneous Mineral Oil Compositions 7 4 3 5 2 21
034 Drying and Gas or Vapor Contact with Solids 8 4 3 2 3 20
164 Metal Founding 2 6 5 3 4 20
216 Etching a Substrate: Processes 1 4 4 8 3 20
271 Sheet Feeding or Delivering 6 3 4 2 5 20
307 Electrical Transmission or Interconnection Systems 6 4 5 4 1 20
333 Wave Transmission Lines and Networks 4 3 4 7 2 20
442 Fabric (Woven, Knitted, or Nonwoven Textile or Cloth, Etc.) 6 4 5 1 4 20
454 Ventilation 5 3 7 4 1 20
037 Excavating 7 4 4 2 2 19
089 Ordnance 2 4 4 6 3 19
101 Printing 4 6 1 7 1 19
204 Chemistry: Electrical and Wave Energy 3 4 2 6 4 19
285 Pipe Joints or Couplings 4 6 3 2 4 19
343 Communications: Radio Wave Antennas 3 3 3 6 4 19
440 Marine Propulsion 6 3 7 2 1 19
703 DP: Structural Design, Modeling, Simulation, and Emulation (Data Processing) 3 3 3 6 4 19
712 Processing Architectures and Instruction Processing, e.g., Processors (Electrical Computers and Digital Processing Systems) 5 3 3 2 6 19
081 Tools 4 4 3 5 2 18
106 Compositions: Coating or Plastic 3 6 2 4 3 18
224 Package and Article Carriers 4 5 5 3 1 18
330 Amplifiers 5 4 2 2 5 18
401 Coating Implements with Material Supply 1 3 6 5 3 18
403 Joints and Connections 5 0 5 7 1 18
434 Education and Demonstration 1 3 4 2 8 18
042 Firearms 4 3 3 5 2 17
188 Brakes 8 3 2 1 3 17
348 Television 1 5 4 4 3 17
060 Power Plants 1 2 3 8 2 16
138 Pipes and Tubular Conduits 7 0 2 2 5 16
172 Earth Working 3 4 2 5 2 16
228 Metal Fusion Bonding 2 1 3 7 3 16
251 Valves and Valve Actuation 1 2 2 4 7 16
254 Implements or Apparatus for Applying Pushing or Pulling Force 5 2 3 4 2 16
374 Thermal Measuring and Testing 3 4 3 1 5 16
431 Combustion 4 7 0 1 4 16
008 Bleaching and Dyeing; Fluid Treatment and Chemical Modification of Textiles and Fibers 2 2 3 5 3 15
072 Metal Deforming 4 2 3 1 5 15
108 Horizontally Supported Planar Surfaces 3 6 2 4 0 15
165 Heat Exchange 4 2 2 3 4 15
313 Electric Lamp and Discharge Devices 1 3 6 2 3 15
446 Amusement Devices: Toys 2 6 3 3 1 15
463 Amusement Devices: Games 2 4 4 2 3 15
092 Expansible Chamber Devices 3 3 2 4 2 14
099 Foods and Beverages: Apparatus 5 2 4 2 1 14
181 Acoustics 3 2 4 3 2 14
221 Article Dispensing 3 2 2 3 4 14
267 Spring Devices 1 4 6 3 0 14
320 Electricity: Battery or Capacitor Charging or Discharging 8 1 1 2 2 14
363 Electric Power Conversion Systems 3 3 5 0 3 14
726 Information Security 5 2 1 5 1 14
004 Baths, Closets, Sinks, and Spittoons 3 2 6 1 1 13
030 Cutlery 3 3 1 3 3 13
047 Plant Husbandry 3 3 2 1 4 13
049 Movable or Removable Closures 1 2 4 4 2 13
074 Machine Element or Mechanism 3 4 5 0 1 13
075 Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures 2 4 2 5 0 13
236 Automatic Temperature and Humidity Regulation 2 2 2 2 5 13
292 Closure Fasteners 1 4 5 0 3 13
351 Optics: Eye Examining, Vision Testing and Correcting 5 2 2 1 3 13
452 Butchering 5 0 4 3 1 13
116 Signals and Indicators 1 2 3 2 4 12
148 Metal Treatment 3 2 3 3 1 12
237 Heating Systems 0 1 4 4 3 12
269 Work Holders 5 5 1 1 0 12
392 Electric Resistance Heating Devices 2 2 4 2 2 12
530 Chemistry: Natural Resins or Derivatives; Peptides or Proteins; Lignins or Reaction Products Thereof 1 3 1 5 2 12
720 Dynamic Optical Information Storage or Retrieval 2 3 1 4 2 12
725 Interactive Video Distribution Systems 0 3 1 5 3 12
016 Miscellaneous Hardware 3 2 4 1 1 11
312 Supports: Cabinet Structure 1 2 4 2 2 11
366 Agitating (e.g., of articles and materials) 2 2 1 4 2 11
708 Arithmetic Processing and Calculating (Electrical Computers) 2 2 1 3 3 11
160 Flexible or Portable Closure, Partition, or Panel 1 0 4 2 3 10
192 Clutches and Power-Stop Control 0 0 4 4 2 10
209 Classifying, Separating, and Assorting Solids 3 1 2 0 4 10
244 Aeronautics and Astronautics 0 2 3 3 2 10
277 Seal for a Joint or Juncture 3 3 1 2 1 10
398 Optical Communications 0 3 2 1 4 10
410 Freight Accommodation On Freight Carrier 2 2 2 3 1 10
084 Music 4 2 0 2 1 9
104 Railways 2 1 3 2 1 9
125 Stone Working 1 1 0 3 4 9
144 Woodworking 1 5 2 1 0 9
177 Weighing Scales 1 2 2 4 0 9
205 Electrolysis: Processes, Compositions Used Therein, and Methods of Preparing the Compositions 1 2 1 3 2 9
229 Envelopes, Wrappers, and Paperboard Boxes 3 3 2 0 1 9
256 Fences 2 0 2 1 4 9
261 Gas and Liquid Contact Apparatus 3 2 3 1 0 9
315 Electric Lamp and Discharge Devices: Systems 2 0 3 2 2 9
336 Inductor Devices 0 3 1 2 3 9
353 Optics: Image Projectors 0 1 2 3 3 9
396 Photography 0 4 0 3 2 9
399 Electrophotography 0 1 2 2 4 9
418 Rotary Expansible Chamber Devices 2 2 2 3 0 9
111 Planting 3 2 0 3 0 8
241 Solid Material Comminution or Disintegration 1 3 3 0 1 8
283 Printed Matter 2 2 0 3 1 8
323 Electricity: Power Supply or Regulation Systems 1 1 2 2 2 8
415 Rotary Kinetic Fluid Motors or Pumps 5 1 1 0 1 8
501 Compositions: Ceramic 1 3 2 1 1 8
502 Catalyst, Solid Sorbent, or Support Therefor: Product or Process of Making 1 4 0 1 2 8
704 DP: Speech Signal Processing, Linguistics, Language Translation, and Audio Compression/Decompression (Data Processing) 1 0 2 4 1 8
223 Apparel Apparatus 3 2 1 1 0 7
305 Wheel Substitutes for Land Vehicles 1 3 2 0 1 7
338 Electrical Resistors 1 0 3 1 2 7
349 Liquid Crystal Cells, Elements and Systems 1 0 3 1 2 7
355 Photocopying 3 1 1 2 0 7
367 Communications, Electrical: Acoustic Wave Systems and Devices 1 0 2 3 1 7
368 Horology: Time Measuring Systems or Devices 1 1 1 3 1 7
474 Endless Belt Power Transmission Systems or Components 1 1 1 2 2 7
475 Planetary Gear Transmission Systems or Components 1 1 2 0 3 7
706 DP: Artificial Intelligence (Data Processing) 1 1 2 2 1 7
091 Motors: Expansible Chamber Type 1 1 2 2 0 6
132 Toilet 2 2 0 0 2 6
175 Boring or Penetrating the Earth 1 3 2 0 0 6
184 Lubrication 1 1 0 4 0 6
279 Chucks or Sockets 2 0 2 0 2 6
293 Vehicle Fenders 0 3 1 0 2 6
294 Handling: Hand and Hoist-Line Implements 2 1 2 0 1 6
335 Electricity: Magnetically Operated Switches, Magnets, and Electromagnets 1 0 1 1 3 6
337 Electricity: Electrothermally or Thermally Actuated Switches 0 1 2 1 2 6
378 X-Ray or Gamma Ray Systems or Devices 2 4 0 0 0 6
411 Expanded, Threaded, Driven, Headed, Tool-Deformed, or Locked-Threaded Fastener 1 2 1 1 1 6
423 Chemistry of Inorganic Compounds 2 0 2 0 2 6
441 Buoys, Rafts, and Aquatic Devices 0 3 2 0 1 6
516 Colloid Systems and Wetting Agents, Subcombinations Thereof, Processes of Making, Stabilizing, Breaking, or Inhibiting 2 0 3 0 1 6
036 Boots, Shoes, and Leggings 0 3 0 1 1 5
070 Locks 1 1 1 2 0 5
122 Liquid Heaters and Vaporizers 0 0 0 2 3 5
225 Severing by Tearing or Breaking 0 3 1 1 0 5
249 Static Molds 2 1 1 0 1 5
298 Land Vehicles: Dumping 1 0 2 0 2 5
303 Fluid-Pressure and Analogous Brake Systems 2 2 0 0 1 5
100 Presses 0 0 0 0 4 4
135 Tent, Canopy, Umbrella, or Cane 1 1 0 2 0 4
173 Tool Driving or Impacting 1 0 1 0 2 4
227 Elongated-Member-Driving Apparatus 2 1 1 0 0 4
299 Mining or In Situ Disintegration of Hard Material 1 1 2 0 0 4
301 Land Vehicles: Wheels and Axles 0 0 3 0 1 4
384 Bearings 2 1 0 0 1 4
386 Television Signal Processing for Dynamic Recording or Reproducing 1 1 1 1 0 4
408 Cutting by Use of Rotating Axially Moving Tool 0 3 1 0 0 4
450 Foundation Garments 1 2 0 0 1 4
494 Imperforate Bowl: Centrifugal Separators 0 1 2 1 0 4
007 Compound Hand Tools 0 0 1 0 2 3
054 Harness for Working Animal 1 1 0 1 0 3
068 Textiles: Fluid Treating Apparatus 0 2 1 0 0 3
071 Chemistry: Fertilizers 0 1 1 0 1 3
117 Single-Crystal, Oriented-Crystal, and Epitaxy Growth Processes; Non-Coating Apparatus Therefor 0 0 0 1 2 3
124 Mechanical Guns and Projectors 1 1 0 1 0 3
166 Wells (shafts or deep borings in the earth, e.g., for oil and gas) 1 0 0 2 0 3
169 Fire Extinguishers 0 0 0 2 1 3
377 Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems 0 1 1 1 0 3
380 Cryptography 0 0 0 3 0 3
409 Gear Cutting, Milling, or Planing 0 1 0 2 0 3
464 Rotary Shafts, Gudgeons, Housings, and Flexible Couplings for Rotary Shafts 0 1 1 0 1 3
504 Plant Protecting and Regulating Compositions 1 1 1 0 0 3
585 Chemistry of Hydrocarbon Compounds 1 1 0 0 1 3
082 Turning (e.g., for metal working) 0 0 1 0 1 2
149 Explosive and Thermic Compositions or Charges 0 1 1 0 0 2
150 Purses, Wallets, and Protective Covers 0 1 1 0 0 2
159 Concentrating Evaporators 0 0 0 1 1 2
162 Paper Making and Fiber Liberation 0 0 1 0 1 2
191 Electricity: Transmission To Vehicles 1 0 1 0 0 2
193 Conveyors, Chutes, Skids, Guides, and Ways 0 0 1 1 0 2
194 Check-Actuated Control Mechanisms 1 0 1 0 0 2
215 Bottles and Jars 0 1 0 0 1 2
232 Deposit and Collection Receptacles 0 2 0 0 0 2
290 Prime-Mover Dynamo Plants 0 1 0 0 1 2
291 Track Sanders 0 1 1 0 0 2
332 Modulators 1 0 0 0 1 2
383 Flexible Bags 0 2 0 0 0 2
412 Bookbinding: Process and Apparatus 1 1 0 0 0 2
416 Fluid Reaction Surfaces (i.e., Impellers) 0 1 0 0 1 2
445 Electric Lamp or Space Discharge Component or Device Manufacturing 1 0 0 1 0 2
472 Amusement Devices 0 2 0 0 0 2
477 Interrelated Power Delivery Controls, Including Engine Control 0 0 0 0 2 2
492 Roll or Roller 0 1 0 1 0 2
493 Manufacturing Container or Tube From Paper; or Other Manufacturing From a Sheet or Web 2 0 0 0 0 2
507 Earth Boring, Well Treating, and Oil Field Chemistry 0 0 0 1 1 2
014 Bridges 0 0 0 0 1 1
026 Textiles: Cloth Finishing 0 0 0 0 1 1
027 Undertaking 0 1 0 0 0 1
044 Fuel and Related Compositions 0 0 1 0 0 1
063 Jewelry 0 1 0 0 0 1
086 Ammunition and Explosive-Charge Making 1 0 0 0 0 1
087 Textiles: Braiding, Netting, and Lace Making 0 0 1 0 0 1
110 Furnaces 0 0 0 1 0 1
127 Sugar, Starch, and Carbohydrates 0 0 0 0 1 1
131 Tobacco 1 0 0 0 0 1
140 Wireworking 0 0 1 0 0 1
152 Resilient Tires and Wheels 0 1 0 0 0 1
168 Farriery 0 0 1 0 0 1
187 Elevator, Industrial Lift Truck, or Stationary Lift for Vehicle 1 0 0 0 0 1
212 Traversing Hoists 0 0 1 0 0 1
218 High-Voltage Switches with Arc Preventing or Extinguishing Devices 0 0 0 1 0 1
238 Railways: Surface Track 0 1 0 0 0 1
281 Books, Strips, and Leaves 0 0 0 0 1 1
329 Demodulators 1 0 0 0 0 1
334 Tuners 0 0 1 0 0 1
388 Electricity: Motor Control Systems 0 0 0 0 1 1
402 Binder Device Releasably Engaging Aperture or Notch of Sheet 1 0 0 0 0 1
407 Cutters, for Shaping 0 0 0 1 0 1
419 Powder Metallurgy Processes 1 0 0 0 0 1
432 Heating 0 0 1 0 0 1
470 Threaded, Headed Fastener, or Washer Making: Process and Apparatus 0 1 0 0 0 1
483 Tool Changing 0 0 1 0 0 1
505 Superconductor Technology: Apparatus, Material, Process 0 0 0 1 0 1
ALL ALL CLASSES 2635 2751 2953 2754 2431 13524


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U.S. Patent and Trademark Office
Electronic Information Products Division - PTMB
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