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U.S. PATENT AND TRADEMARK OFFICE
Office of Electronic Information Products
Patent Technology Monitoring Division (PTMD)

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

Count of 2000 - 2004 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 2000 2001 2002 2003 2004 Total
128 Surgery (includes Class 600) 146 143 141 165 103 698
607 Surgery: Light, Thermal, and Electrical Application 146 124 132 127 113 642
360 Dynamic Magnetic Information Storage or Retrieval 92 97 124 126 163 602
428 Stock Material or Miscellaneous Articles 104 92 102 104 96 498
424 Drug, Bio-Affecting and Body Treating Compositions (includes Class 514) 71 78 104 84 71 408
604 Surgery (Medicators and Receptors) 77 76 59 101 70 383
520 Synthetic Resins or Natural Rubbers (includes Classes 520-528) 56 63 81 79 67 346
606 Surgery (instruments) 76 57 54 84 68 339
623 Prosthesis (i.e., Artificial Body Members), Parts Thereof, or Aids and Accessories Therefor 57 71 70 53 54 305
073 Measuring and Testing 37 31 33 82 44 227
426 Food or Edible Material: Processes, Compositions, and Products 45 40 36 47 33 201
711 Memory (Electrical Computers and Digital Processing Systems) 28 46 47 31 47 199
710 Input/Output (Electrical Computers and Digital Processing Systems) 42 40 37 41 28 188
707 DP: Database and File Management or Data Structures (Data Processing) 32 29 31 30 40 162
385 Optical Waveguides 15 19 34 43 46 157
324 Electricity: Measuring and Testing 19 22 36 47 27 151
156 Adhesive Bonding and Miscellaneous Chemical Manufacture 22 36 34 34 24 150
430 Radiation Imagery Chemistry: Process, Composition, or Product Thereof 24 27 35 27 27 140
800 Multicellular Living Organisms and Unmodified Parts Thereof and Related Processes 35 34 11 13 47 140
427 Coating Processes 28 26 30 23 30 137
359 Optics: Systems and Elements 27 24 27 32 25 135
435 Chemistry: Molecular Biology and Microbiology 27 26 28 33 20 134
439 Electrical Connectors 22 18 26 32 32 130
340 Communications: Electrical 14 25 29 30 31 129
264 Plastic and Nonmetallic Article Shaping or Treating: Processes 24 20 19 29 35 127
714 Error Detection/Correction and Fault Detection/Recovery 28 19 21 26 32 126
029 Metal Working 27 26 21 23 26 123
361 Electricity: Electrical Systems and Devices 18 16 28 29 24 115
451 Abrading 25 18 18 25 29 115
510 Cleaning Compositions for Solid Surfaces, Auxiliary Compositions Therefor, or Processes of Preparing the Compositions 14 27 32 25 16 114
709 Multicomputer Data Transferring or Plural Processor Synchronization (Electrical Computers and Digital Processing Systems) 18 22 18 19 32 109
532 Organic Compounds (includes Classes 532-570) 13 25 30 18 19 105
052 Static Structures (e.g., Buildings) 23 22 11 23 23 102
702 DP: Measuring, Calibrating, or Testing (Data Processing) 8 9 20 35 29 101
715 DP: Presentation Processing of Document, Operator Interface Processing, and Screen Saver Display Processing (Data Processing) 22 25 20 17 15 99
210 Liquid Purification or Separation 19 21 21 26 10 97
206 Special Receptacle or Package 21 24 15 17 17 94
137 Fluid Handling 21 29 16 12 15 93
280 Land Vehicles 20 19 25 11 18 93
062 Refrigeration 14 14 19 24 12 83
356 Optics: Measuring and Testing 14 9 13 25 22 83
700 DP: Generic Control Systems or Specific Applications (Data Processing) 10 8 13 21 28 80
248 Supports (e.g., for holding articles, etc.) 20 9 15 26 8 78
602 Surgery: Splint, Brace, or Bandage 17 20 15 19 6 77
327 Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems 12 24 9 18 13 76
438 Semiconductor Device Manufacturing: Process 10 17 10 19 19 75
717 DP: Software Development, Installation, and Management (Data Processing) 9 22 14 14 15 74
257 Active Solid-State Devices (e.g., Transistors, Solid-State Diodes) 11 8 13 20 19 71
250 Radiant Energy 9 14 10 25 10 68
219 Electric Heating 15 12 13 13 14 67
370 Multiplex Communications 12 14 12 16 13 67
362 Illumination 10 13 14 16 12 65
043 Fishing, Trapping, and Vermin Destroying 15 7 17 15 8 62
365 Static Information Storage and Retrieval 7 12 13 14 16 62
713 Support (Electrical Computers and Digital Processing Systems) 16 13 13 9 11 62
239 Fluid Sprinkling, Spraying, and Diffusing 26 4 6 13 9 58
414 Material or Article Handling 18 9 11 10 10 58
345 Computer Graphics Processing and Selective Visual Display Systems 12 12 12 9 11 56
015 Brushing, Scrubbing, and General Cleaning 18 12 9 9 7 55
347 Incremental Printing of Symbolic Information 5 8 12 11 19 55
180 Motor Vehicles 17 9 14 6 8 54
417 Pumps 18 10 8 8 10 54
055 Gas Separation 11 10 12 11 9 53
095 Gas Separation: Processes 7 9 13 12 12 53
422 Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing 8 8 9 12 16 53
174 Electricity: Conductors and Insulators 5 11 10 14 12 52
222 Dispensing (apparatus and process) 12 10 11 9 10 52
382 Image Analysis 10 6 8 13 15 52
429 Chemistry: Electrical Current Producing Apparatus, Product, and Process 16 14 10 7 5 52
701 DP: Vehicles, Navigation, and Relative Location (Data Processing) 3 7 12 17 13 52
134 Cleaning and Liquid Contact with Solids 7 12 13 12 7 51
326 Electronic Digital Logic Circuitry 10 16 14 5 5 50
051 Abrasive Tool Making Process, Material, or Composition 7 14 7 13 8 49
040 Card, Picture, or Sign Exhibiting 13 6 9 12 8 48
716 DP: Design and Analysis of Circuit or Semiconductor Mask (Data Processing) 3 10 7 10 15 45
002 Apparel 9 14 11 4 5 43
053 Package Making 18 8 8 5 4 43
211 Supports: Racks 8 7 11 7 10 43
425 Plastic Article or Earthenware Shaping or Treating: Apparatus 6 13 7 4 12 42
342 Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation) 4 9 4 5 17 39
705 DP: Financial, Business Practice, Management, or Cost/Price Determination (Data Processing) 17 4 7 6 5 39
123 Internal-Combustion Engines 15 9 6 5 3 38
141 Fluent Material Handling, with Receiver or Receiver Coacting Means 11 8 8 7 4 38
473 Games Using Tangible Projectile 7 9 5 11 6 38
235 Registers (e.g., cash registers, calculators, devices for counting movements of devices, etc.) 8 5 6 6 12 37
482 Exercise Devices 8 10 11 4 4 37
375 Pulse or Digital Communications 6 7 6 11 6 36
096 Gas Separation: Apparatus 6 7 12 7 3 35
119 Animal Husbandry 6 5 11 5 7 34
242 Winding, Tensioning, or Guiding 6 8 8 6 6 34
252 Compositions 9 6 8 6 5 34
033 Geometrical Instruments 5 9 9 6 4 33
369 Dynamic Information Storage or Retrieval 6 9 6 8 4 33
318 Electricity: Motive Power Systems 11 6 5 6 4 32
404 Road Structure, Process, or Apparatus 7 4 5 7 9 32
379 Telephonic Communications 1 3 5 9 13 31
405 Hydraulic and Earth Engineering 4 7 3 12 5 31
433 Dentistry 9 11 3 5 3 31
436 Chemistry: Analytical and Immunological Testing 5 3 8 5 10 31
718 Virtual Machine Task or Process Management or Task Management/Control (Electrical Computers and Digital Processing Systems) 7 5 2 4 13 31
220 Receptacles 7 4 6 7 6 30
296 Land Vehicles: Bodies and Tops 12 3 5 6 4 30
024 Buckles, Buttons, Clasps, Etc. 6 5 6 6 6 29
114 Ships 8 5 4 3 9 29
118 Coating Apparatus 6 5 4 9 5 29
198 Conveyors: Power-Driven 5 9 6 5 4 29
310 Electrical Generator or Motor Structure 4 10 4 6 4 28
381 Electrical Audio Signal Processing Systems and Devices 3 3 8 4 10 28
056 Harvesters 8 1 10 3 5 27
297 Chairs and Seats 5 4 6 3 9 27
442 Fabric (Woven, Knitted, or Nonwoven Textile or Cloth, Etc.) 11 6 4 5 1 27
455 Telecommunications 5 3 6 5 8 27
083 Cutting 3 10 3 6 4 26
358 Facsimile and Static Presentation Processing 2 4 6 11 3 26
034 Drying and Gas or Vapor Contact with Solids 8 8 4 3 2 25
126 Stoves and Furnaces 5 5 4 5 6 25
200 Electricity: Circuit Makers and Breakers 1 2 7 6 9 25
005 Beds 3 2 11 3 5 24
182 Fire Escape, Ladder, or Scaffold 7 6 3 2 6 24
333 Wave Transmission Lines and Networks 6 4 3 4 7 24
400 Typewriting Machines 2 5 10 2 5 24
719 Interprogram Communication or Interprocess Communication (Ipc) (Electrical Computers and Digital Processing Systems) 5 6 4 2 7 24
101 Printing 5 4 6 1 7 23
102 Ammunition and Explosives 4 8 1 7 3 23
224 Package and Article Carriers 6 4 5 5 3 23
273 Amusement Devices: Games 5 5 7 2 4 23
341 Coded Data Generation or Conversion 6 5 8 2 2 23
418 Rotary Expansible Chamber Devices 14 2 2 2 3 23
037 Excavating 5 7 4 4 2 22
307 Electrical Transmission or Interconnection Systems 3 6 4 5 4 22
331 Oscillators 2 6 4 6 4 22
372 Coherent Light Generators 4 1 0 7 10 22
108 Horizontally Supported Planar Surfaces 6 3 6 2 4 21
216 Etching a Substrate: Processes 4 1 4 4 8 21
454 Ventilation 2 5 3 7 4 21
508 Solid Anti-Friction Devices, Materials Therefor, Lubricant or Separant Compositions for Moving Solid Surfaces, and Miscellaneous Mineral Oil Compositions 2 7 4 3 5 21
703 DP: Structural Design, Modeling, Simulation, and Emulation (Data Processing) 6 3 3 3 6 21
074 Machine Element or Mechanism 7 3 4 6 0 20
081 Tools 4 4 4 3 5 20
348 Television 6 1 5 4 4 20
601 Surgery: Kinesitherapy 3 5 4 3 5 20
106 Compositions: Coating or Plastic 4 3 6 2 4 19
204 Chemistry: Electrical and Wave Energy 4 3 4 2 6 19
285 Pipe Joints or Couplings 4 4 6 3 2 19
403 Joints and Connections 2 5 0 5 7 19
440 Marine Propulsion 1 6 3 7 2 19
049 Movable or Removable Closures 7 1 2 4 4 18
099 Foods and Beverages: Apparatus 5 5 2 4 2 18
164 Metal Founding 2 2 6 5 3 18
251 Valves and Valve Actuation 9 1 2 2 4 18
254 Implements or Apparatus for Applying Pushing or Pulling Force 4 5 2 3 4 18
269 Work Holders 6 5 5 1 1 18
271 Sheet Feeding or Delivering 3 6 3 4 2 18
446 Amusement Devices: Toys 4 2 6 3 3 18
712 Processing Architectures and Instruction Processing, e.g., Processors (Electrical Computers and Digital Processing Systems) 5 5 3 3 2 18
089 Ordnance 1 2 4 4 6 17
172 Earth Working 3 3 4 2 5 17
401 Coating Implements with Material Supply 2 1 3 6 5 17
008 Bleaching and Dyeing; Fluid Treatment and Chemical Modification of Textiles and Fibers 4 2 2 3 5 16
042 Firearms 1 4 3 3 5 16
060 Power Plants 2 1 2 3 8 16
075 Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures 3 2 4 2 5 16
188 Brakes 2 8 3 2 1 16
267 Spring Devices 2 1 4 6 3 16
320 Electricity: Battery or Capacitor Charging or Discharging 4 8 1 1 2 16
330 Amplifiers 3 5 4 2 2 16
343 Communications: Radio Wave Antennas 1 3 3 3 6 16
452 Butchering 4 5 0 4 3 16
004 Baths, Closets, Sinks, and Spittoons 3 3 2 6 1 15
030 Cutlery 5 3 3 1 3 15
047 Plant Husbandry 6 3 3 2 1 15
138 Pipes and Tubular Conduits 4 7 0 2 2 15
181 Acoustics 3 3 2 4 3 15
228 Metal Fusion Bonding 2 2 1 3 7 15
431 Combustion 3 4 7 0 1 15
530 Chemistry: Natural Resins or Derivatives; Peptides or Proteins; Lignins or Reaction Products Thereof 5 1 3 1 5 15
072 Metal Deforming 4 4 2 3 1 14
084 Music 6 4 2 0 2 14
374 Thermal Measuring and Testing 3 3 4 3 1 14
092 Expansible Chamber Devices 1 3 3 2 4 13
111 Planting 5 3 2 0 3 13
144 Woodworking 4 1 5 2 1 13
165 Heat Exchange 2 4 2 2 3 13
221 Article Dispensing 3 3 2 2 3 13
229 Envelopes, Wrappers, and Paperboard Boxes 5 3 3 2 0 13
292 Closure Fasteners 3 1 4 5 0 13
312 Supports: Cabinet Structure 4 1 2 4 2 13
351 Optics: Eye Examining, Vision Testing and Correcting 3 5 2 2 1 13
392 Electric Resistance Heating Devices 3 2 2 4 2 13
399 Electrophotography 8 0 1 2 2 13
463 Amusement Devices: Games 1 2 4 4 2 13
016 Miscellaneous Hardware 2 3 2 4 1 12
148 Metal Treatment 1 3 2 3 3 12
313 Electric Lamp and Discharge Devices 0 1 3 6 2 12
363 Electric Power Conversion Systems 1 3 3 5 0 12
410 Freight Accommodation On Freight Carrier 3 2 2 2 3 12
236 Automatic Temperature and Humidity Regulation 3 2 2 2 2 11
241 Solid Material Comminution or Disintegration 4 1 3 3 0 11
261 Gas and Liquid Contact Apparatus 2 3 2 3 1 11
355 Photocopying 4 3 1 1 2 11
434 Education and Demonstration 1 1 3 4 2 11
720 Dynamic Optical Information Storage or Retrieval 1 2 3 1 4 11
116 Signals and Indicators 2 1 2 3 2 10
192 Clutches and Power-Stop Control 2 0 0 4 4 10
244 Aeronautics 2 0 2 3 3 10
277 Seal for a Joint or Juncture 1 3 3 1 2 10
366 Agitating (e.g., of articles and materials) 2 2 2 1 3 10
378 X-Ray or Gamma Ray Systems or Devices 4 2 4 0 0 10
706 DP: Artificial Intelligence (Data Processing) 4 1 1 2 2 10
725 Interactive Video Distribution Systems 1 0 3 1 5 10
036 Boots, Shoes, and Leggings 5 0 3 0 1 9
104 Railways 1 2 1 3 2 9
160 Flexible or Portable Closure, Partition, or Panel 2 1 0 4 2 9
177 Weighing Scales 0 1 2 2 4 9
205 Electrolysis: Processes, Compositions Used Therein, and Methods of Preparing the Compositions 2 1 2 1 3 9
237 Heating Systems 0 0 1 4 4 9
283 Printed Matter 2 2 2 0 3 9
294 Handling: Hand and Hoist-Line Implements 4 2 1 2 0 9
349 Liquid Crystal Cells, Elements and Systems 4 1 0 3 1 9
396 Photography 2 0 4 0 3 9
415 Rotary Kinetic Fluid Motors or Pumps 2 5 1 1 0 9
704 DP: Speech Signal Processing, Linguistics, Language Translation, and Audio Compression/Decompression (Data Processing) 2 1 0 2 4 9
175 Boring or Penetrating the Earth 2 1 3 2 0 8
223 Apparel Apparatus 1 3 2 1 1 8
256 Fences 3 2 0 2 1 8
338 Electrical Resistors 3 1 0 3 1 8
383 Flexible Bags 6 0 2 0 0 8
474 Endless Belt Power Transmission Systems or Components 3 1 1 1 2 8
516 Colloid Systems and Wetting Agents, Subcombinations Thereof, Processes of Making, Stabilizing, Breaking, or Inhibiting 3 2 0 3 0 8
708 Arithmetic Processing and Calculating (Electrical Computers) 0 2 2 1 3 8
091 Motors: Expansible Chamber Type 1 1 1 2 2 7
124 Mechanical Guns and Projectors 4 1 1 0 1 7
209 Classifying, Separating, and Assorting Solids 1 3 1 2 0 7
305 Wheel Substitutes for Land Vehicles 1 1 3 2 0 7
315 Electric Lamp and Discharge Devices: Systems 0 2 0 3 2 7
336 Inductor Devices 1 0 3 1 2 7
411 Expanded, Threaded, Driven, Headed, Tool-Deformed, or Locked-Threaded Fastener 2 1 2 1 1 7
423 Chemistry of Inorganic Compounds 3 2 0 2 0 7
501 Compositions: Ceramic 0 1 3 2 1 7
125 Stone Working 1 1 1 0 3 6
135 Tent, Canopy, Umbrella, or Cane 2 1 1 0 2 6
184 Lubrication 0 1 1 0 4 6
323 Electricity: Power Supply or Regulation Systems 0 1 1 2 2 6
353 Optics: Image Projectors 0 0 1 2 3 6
367 Communications, Electrical: Acoustic Wave Systems and Devices 0 1 0 2 3 6
368 Horology: Time Measuring Systems or Devices 0 1 1 1 3 6
398 Optical Communications 0 0 3 2 1 6
408 Cutting by Use of Rotating Axially Moving Tool 2 0 3 1 0 6
409 Gear Cutting, Milling, or Planing 3 0 1 0 2 6
441 Buoys, Rafts, and Aquatic Devices 1 0 3 2 0 6
502 Catalyst, Solid Sorbent, or Support Therefor: Product or Process of Making 0 1 4 0 1 6
070 Locks 0 1 1 1 2 5
132 Toilet 1 2 2 0 0 5
194 Check-Actuated Control Mechanisms 3 1 0 1 0 5
225 Severing by Tearing or Breaking 0 0 3 1 1 5
249 Static Molds 1 2 1 1 0 5
279 Chucks or Sockets 1 2 0 2 0 5
299 Mining or In Situ Disintegration of Hard Material 1 1 1 2 0 5
303 Fluid-Pressure and Analogous Brake Systems 1 2 2 0 0 5
384 Bearings 2 2 1 0 0 5
504 Plant Protecting and Regulating Compositions 2 1 1 1 0 5
054 Harness (for animals) 1 1 1 0 1 4
227 Elongated-Member-Driving Apparatus 0 2 1 1 0 4
293 Vehicle Fenders 0 0 3 1 0 4
301 Land Vehicles: Wheels and Axles 1 0 0 3 0 4
335 Electricity: Magnetically Operated Switches, Magnets, and Electromagnets 1 1 0 1 1 4
337 Electricity: Electrothermally or Thermally Actuated Switches 0 0 1 2 1 4
380 Cryptography 1 0 0 0 3 4
386 Television Signal Processing for Dynamic Recording or Reproducing 0 1 1 1 1 4
450 Foundation Garments 1 1 2 0 0 4
475 Planetary Gear Transmission Systems or Components 0 1 1 2 0 4
493 Manufacturing Container or Tube From Paper; or Other Manufacturing From a Sheet or Web 2 2 0 0 0 4
494 Imperforate Bowl: Centrifugal Separators 0 0 1 2 1 4
001 ** Classification Undetermined ** 0 0 0 1 2 3
007 Compound Hand Tools 2 0 0 1 0 3
068 Textiles: Fluid Treating Apparatus 0 0 2 1 0 3
166 Wells (shafts or deep borings in the earth, e.g., for oil and gas) 0 1 0 0 2 3
169 Fire Extinguishers 1 0 0 0 2 3
212 Traversing Hoists 2 0 0 1 0 3
298 Land Vehicles: Dumping 0 1 0 2 0 3
377 Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems 0 0 1 1 1 3
406 Conveyors: Fluid Current 3 0 0 0 0 3
416 Fluid Reaction Surfaces (i.e., Impellers) 2 0 1 0 0 3
464 Rotary Shafts, Gudgeons, Housings, and Flexible Couplings for Rotary Shafts 1 0 1 1 0 3
492 Roll or Roller 1 0 1 0 1 3
044 Fuel and Related Compositions 1 0 0 1 0 2
071 Chemistry: Fertilizers 0 0 1 1 0 2
122 Liquid Heaters and Vaporizers 0 0 0 0 2 2
149 Explosive and Thermic Compositions or Charges 0 0 1 1 0 2
150 Purses, Wallets, and Protective Covers 0 0 1 1 0 2
162 Paper Making and Fiber Liberation 1 0 0 1 0 2
173 Tool Driving or Impacting 0 1 0 1 0 2
191 Electricity: Transmission To Vehicles 0 1 0 1 0 2
193 Conveyors, Chutes, Skids, Guides, and Ways 0 0 0 1 1 2
226 Advancing Material of Indeterminate Length 2 0 0 0 0 2
232 Deposit and Collection Receptacles 0 0 2 0 0 2
291 Track Sanders 0 0 1 1 0 2
412 Bookbinding: Process and Apparatus 0 1 1 0 0 2
432 Heating 1 0 0 1 0 2
445 Electric Lamp or Space Discharge Component or Device Manufacturing 0 1 0 0 1 2
460 Crop Threshing or Separating 2 0 0 0 0 2
472 Amusement Devices 0 0 2 0 0 2
585 Chemistry of Hydrocarbon Compounds 0 1 1 0 0 2
027 Undertaking 0 0 1 0 0 1
063 Jewelry 0 0 1 0 0 1
082 Turning (e.g., for metal working) 0 0 0 1 0 1
086 Ammunition and Explosive-Charge Making 0 1 0 0 0 1
087 Textiles: Braiding, Netting, and Lace Making 0 0 0 1 0 1
100 Presses 1 0 0 0 0 1
110 Furnaces 0 0 0 0 1 1
117 Single-Crystal, Oriented-Crystal, and Epitaxy Growth Processes; Non-Coating Apparatus Therefor 0 0 0 0 1 1
131 Tobacco 0 1 0 0 0 1
139 Textiles: Weaving 1 0 0 0 0 1
140 Wireworking 0 0 0 1 0 1
152 Resilient Tires and Wheels 0 0 1 0 0 1
159 Concentrating Evaporators 0 0 0 0 1 1
168 Farriery 0 0 0 1 0 1
187 Elevator, Industrial Lift Truck, or Stationary Lift for Vehicle 0 1 0 0 0 1
215 Bottles and Jars 0 0 1 0 0 1
218 High-Voltage Switches with Arc Preventing or Extinguishing Devices 0 0 0 0 1 1
238 Railways: Surface Track 0 0 1 0 0 1
290 Prime-Mover Dynamo Plants 0 0 1 0 0 1
329 Demodulators 0 1 0 0 0 1
332 Modulators 0 1 0 0 0 1
334 Tuners 0 0 0 1 0 1
402 Binder Device Releasably Engaging Aperture or Notch of Sheet 0 1 0 0 0 1
407 Cutters, for Shaping 0 0 0 0 1 1
419 Powder Metallurgy Processes 0 1 0 0 0 1
470 Threaded, Headed Fastener, or Washer Making: Process and Apparatus 0 0 1 0 0 1
483 Tool Changing 0 0 0 1 0 1
503 Record Receiver Having Plural Interactive Leaves or a Colorless Color Former, Method of Use, or Developer Therefor 1 0 0 0 0 1
505 Superconductor Technology: Apparatus, Material, Process 0 0 0 0 1 1
507 Earth Boring, Well Treating, and Oil Field Chemistry 0 0 0 0 1 1
ALL ALL CLASSES 2713 2635 2751 2955 2754 13808


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