166 |
Wells (shafts or deep borings in the earth, e.g., for oil and gas) |
9 |
14 |
18 |
28 |
18 |
87 |
424 |
Drug, Bio-Affecting and Body Treating Compositions (includes Class 514) |
9 |
10 |
9 |
13 |
11 |
52 |
367 |
Communications, Electrical: Acoustic Wave Systems and Devices |
4 |
4 |
3 |
8 |
27 |
46 |
128 |
Surgery (includes Class 600) |
11 |
7 |
7 |
7 |
7 |
39 |
073 |
Measuring and Testing |
10 |
9 |
7 |
4 |
7 |
37 |
370 |
Multiplex Communications |
6 |
8 |
4 |
3 |
11 |
32 |
356 |
Optics: Measuring and Testing |
4 |
7 |
6 |
6 |
6 |
29 |
405 |
Hydraulic and Earth Engineering |
6 |
6 |
9 |
2 |
4 |
27 |
702 |
DP: Measuring, Calibrating, or Testing (Data Processing) |
6 |
3 |
4 |
3 |
10 |
26 |
210 |
Liquid Purification or Separation |
3 |
8 |
2 |
8 |
4 |
25 |
114 |
Ships |
4 |
4 |
3 |
5 |
7 |
23 |
435 |
Chemistry: Molecular Biology and Microbiology |
6 |
2 |
3 |
5 |
5 |
21 |
520 |
Synthetic Resins or Natural Rubbers (includes Classes 520-528) |
6 |
7 |
3 |
3 |
2 |
21 |
324 |
Electricity: Measuring and Testing |
3 |
4 |
3 |
3 |
5 |
18 |
175 |
Boring or Penetrating the Earth |
6 |
1 |
5 |
1 |
4 |
17 |
423 |
Chemistry of Inorganic Compounds |
5 |
4 |
1 |
0 |
7 |
17 |
360 |
Dynamic Magnetic Information Storage or Retrieval |
3 |
4 |
4 |
3 |
2 |
16 |
385 |
Optical Waveguides |
3 |
5 |
5 |
2 |
1 |
16 |
436 |
Chemistry: Analytical and Immunological Testing |
3 |
2 |
3 |
3 |
5 |
16 |
095 |
Gas Separation: Processes |
4 |
3 |
2 |
4 |
1 |
14 |
382 |
Image Analysis |
2 |
1 |
3 |
7 |
1 |
14 |
280 |
Land Vehicles |
4 |
4 |
2 |
1 |
2 |
13 |
532 |
Organic Compounds (includes Classes 532-570) |
3 |
3 |
2 |
2 |
3 |
13 |
062 |
Refrigeration |
5 |
1 |
3 |
1 |
2 |
12 |
137 |
Fluid Handling |
3 |
0 |
3 |
3 |
3 |
12 |
250 |
Radiant Energy |
0 |
1 |
4 |
5 |
2 |
12 |
709 |
Multicomputer Data Transferring (Electrical Computers and Digital Processing Systems) |
1 |
2 |
3 |
3 |
3 |
12 |
219 |
Electric Heating |
4 |
3 |
1 |
0 |
3 |
11 |
174 |
Electricity: Conductors and Insulators |
1 |
2 |
2 |
2 |
3 |
10 |
340 |
Communications: Electrical |
0 |
1 |
3 |
3 |
3 |
10 |
455 |
Telecommunications |
2 |
2 |
2 |
1 |
3 |
10 |
060 |
Power Plants |
3 |
2 |
1 |
0 |
3 |
9 |
205 |
Electrolysis: Processes, Compositions Used Therein, and Methods of Preparing the Compositions |
2 |
2 |
2 |
1 |
2 |
9 |
341 |
Coded Data Generation or Conversion |
1 |
1 |
3 |
3 |
1 |
9 |
530 |
Chemistry: Natural Resins or Derivatives; Peptides or Proteins; Lignins or Reaction Products Thereof |
1 |
2 |
3 |
1 |
2 |
9 |
707 |
DP: Database and File Management or Data Structures (Data Processing) |
2 |
0 |
1 |
5 |
1 |
9 |
204 |
Chemistry: Electrical and Wave Energy |
0 |
1 |
2 |
2 |
3 |
8 |
257 |
Active Solid-State Devices (e.g., Transistors, Solid-State Diodes) |
1 |
2 |
2 |
3 |
0 |
8 |
336 |
Inductor Devices |
1 |
2 |
3 |
2 |
0 |
8 |
375 |
Pulse or Digital Communications |
1 |
0 |
1 |
4 |
2 |
8 |
422 |
Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing |
3 |
1 |
2 |
2 |
0 |
8 |
426 |
Food or Edible Material: Processes, Compositions, and Products |
4 |
1 |
3 |
0 |
0 |
8 |
700 |
DP: Generic Control Systems or Specific Applications (Data Processing) |
2 |
0 |
0 |
3 |
3 |
8 |
029 |
Metal Working |
1 |
3 |
2 |
1 |
0 |
7 |
209 |
Classifying, Separating, and Assorting Solids |
2 |
1 |
1 |
3 |
0 |
7 |
342 |
Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation) |
1 |
1 |
1 |
2 |
2 |
7 |
348 |
Television |
1 |
0 |
2 |
1 |
3 |
7 |
365 |
Static Information Storage and Retrieval |
3 |
2 |
0 |
1 |
1 |
7 |
381 |
Electrical Audio Signal Processing Systems and Devices |
3 |
1 |
2 |
0 |
1 |
7 |
428 |
Stock Material or Miscellaneous Articles |
3 |
1 |
1 |
1 |
1 |
7 |
502 |
Catalyst, Solid Sorbent, or Support Therefor: Product or Process of Making |
3 |
2 |
1 |
0 |
1 |
7 |
606 |
Surgery (instruments) |
2 |
0 |
3 |
2 |
0 |
7 |
055 |
Gas Separation |
2 |
0 |
1 |
1 |
2 |
6 |
106 |
Compositions: Coating or Plastic |
1 |
2 |
0 |
1 |
2 |
6 |
164 |
Metal Founding |
0 |
2 |
3 |
0 |
1 |
6 |
251 |
Valves and Valve Actuation |
2 |
3 |
1 |
0 |
0 |
6 |
290 |
Prime-Mover Dynamo Plants |
1 |
1 |
2 |
0 |
2 |
6 |
345 |
Computer Graphics Processing and Selective Visual Display Systems |
1 |
0 |
1 |
2 |
2 |
6 |
379 |
Telephonic Communications |
2 |
1 |
1 |
1 |
1 |
6 |
604 |
Surgery (Medicators and Receptors) |
2 |
1 |
1 |
1 |
1 |
6 |
703 |
DP: Structural Design, Modeling, Simulation, and Emulation (Data Processing) |
0 |
1 |
4 |
0 |
1 |
6 |
710 |
Input/Output (Electrical Computers and Digital Processing Systems) |
1 |
0 |
0 |
1 |
4 |
6 |
714 |
Error Detection/Correction and Fault Detection/Recovery |
0 |
0 |
0 |
2 |
4 |
6 |
074 |
Machine Element or Mechanism |
2 |
1 |
2 |
0 |
0 |
5 |
138 |
Pipes and Tubular Conduits |
0 |
0 |
1 |
2 |
2 |
5 |
297 |
Chairs and Seats |
2 |
0 |
1 |
0 |
2 |
5 |
327 |
Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems |
0 |
0 |
2 |
3 |
0 |
5 |
353 |
Optics: Image Projectors |
2 |
0 |
0 |
1 |
2 |
5 |
362 |
Illumination |
1 |
2 |
1 |
1 |
0 |
5 |
441 |
Buoys, Rafts, and Aquatic Devices |
2 |
1 |
2 |
0 |
0 |
5 |
711 |
Memory (Electrical Computers and Digital Processing Systems) |
0 |
1 |
0 |
1 |
3 |
5 |
033 |
Geometrical Instruments |
0 |
1 |
1 |
1 |
1 |
4 |
075 |
Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures |
2 |
0 |
0 |
2 |
0 |
4 |
081 |
Tools |
0 |
1 |
1 |
0 |
2 |
4 |
102 |
Ammunition and Explosives |
1 |
2 |
1 |
0 |
0 |
4 |
141 |
Fluent Material Handling, with Receiver or Receiver Coacting Means |
1 |
2 |
1 |
0 |
0 |
4 |
192 |
Clutches and Power-Stop Control |
2 |
0 |
2 |
0 |
0 |
4 |
242 |
Winding, Tensioning, or Guiding |
0 |
1 |
1 |
2 |
0 |
4 |
264 |
Plastic and Nonmetallic Article Shaping or Treating: Processes |
1 |
0 |
1 |
0 |
2 |
4 |
343 |
Communications: Radio Wave Antennas |
0 |
1 |
2 |
1 |
0 |
4 |
359 |
Optical: Systems and Elements |
0 |
1 |
0 |
1 |
2 |
4 |
417 |
Pumps |
2 |
0 |
2 |
0 |
0 |
4 |
439 |
Electrical Connectors |
0 |
1 |
3 |
0 |
0 |
4 |
518 |
Chemistry: Fischer-Tropsch Processes; or Purification or Recovery of Products Thereof |
3 |
0 |
1 |
0 |
0 |
4 |
623 |
Prosthesis (i.e., Artificial Body Members), Parts Thereof, or Aids and Accessories Therefor |
0 |
0 |
1 |
2 |
1 |
4 |
705 |
DP: Financial, Business Practice, Management, or Cost/Price Determination (Data Processing) |
0 |
0 |
1 |
1 |
2 |
4 |
713 |
Support (Electrical Computers and Digital Processing Systems) |
0 |
0 |
0 |
2 |
2 |
4 |
715 |
DP: Presentation Processing of Document, Operator Interface Processing, and Screen Saver Display Processing (Data Processing) |
0 |
1 |
3 |
0 |
0 |
4 |
002 |
Apparel |
1 |
0 |
1 |
1 |
0 |
3 |
037 |
Excavating |
0 |
2 |
0 |
0 |
1 |
3 |
052 |
Static Structures (e.g., Buildings) |
1 |
0 |
2 |
0 |
0 |
3 |
198 |
Conveyors: Power-Driven |
2 |
0 |
0 |
1 |
0 |
3 |
200 |
Electricity: Circuit Makers and Breakers |
0 |
0 |
0 |
2 |
1 |
3 |
206 |
Special Receptacle or Package |
1 |
1 |
0 |
1 |
0 |
3 |
235 |
Registers (e.g., cash registers, calculators, devices for counting movements of devices, etc.) |
0 |
2 |
1 |
0 |
0 |
3 |
239 |
Fluid Sprinkling, Spraying, and Diffusing |
0 |
0 |
1 |
0 |
2 |
3 |
241 |
Solid Material Comminution or Disintegration |
2 |
0 |
1 |
0 |
0 |
3 |
252 |
Compositions |
1 |
1 |
0 |
1 |
0 |
3 |
363 |
Electric Power Conversion Systems |
0 |
2 |
0 |
0 |
1 |
3 |
374 |
Thermal Measuring and Testing |
1 |
1 |
0 |
1 |
0 |
3 |
415 |
Rotary Kinetic Fluid Motors or Pumps |
0 |
1 |
1 |
0 |
1 |
3 |
433 |
Dentistry |
0 |
2 |
0 |
1 |
0 |
3 |
482 |
Exercise Devices |
0 |
0 |
1 |
1 |
1 |
3 |
506 |
Combinatorial Chemistry Technology: Method, Library, Apparatus |
2 |
0 |
0 |
0 |
1 |
3 |
507 |
Earth Boring, Well Treating, and Oil Field Chemistry |
0 |
0 |
1 |
1 |
1 |
3 |
005 |
Beds |
0 |
0 |
0 |
0 |
2 |
2 |
015 |
Brushing, Scrubbing, and General Cleaning |
0 |
1 |
0 |
0 |
1 |
2 |
024 |
Buckles, Buttons, Clasps, Etc. |
0 |
2 |
0 |
0 |
0 |
2 |
072 |
Metal Deforming |
0 |
0 |
2 |
0 |
0 |
2 |
089 |
Ordnance |
1 |
0 |
0 |
1 |
0 |
2 |
092 |
Expansible Chamber Devices |
0 |
0 |
1 |
1 |
0 |
2 |
096 |
Gas Separation: Apparatus |
1 |
0 |
0 |
0 |
1 |
2 |
118 |
Coating Apparatus |
0 |
1 |
0 |
0 |
1 |
2 |
119 |
Animal Husbandry |
0 |
1 |
0 |
0 |
1 |
2 |
123 |
Internal-Combustion Engines |
0 |
1 |
1 |
0 |
0 |
2 |
148 |
Metal Treatment |
1 |
0 |
0 |
0 |
1 |
2 |
194 |
Check-Actuated Control Mechanisms |
0 |
2 |
0 |
0 |
0 |
2 |
216 |
Etching a Substrate: Processes |
1 |
0 |
1 |
0 |
0 |
2 |
220 |
Receptacles |
0 |
0 |
0 |
0 |
2 |
2 |
267 |
Spring Devices |
0 |
0 |
1 |
1 |
0 |
2 |
277 |
Seal for a Joint or Juncture |
0 |
1 |
1 |
0 |
0 |
2 |
285 |
Pipe Joints or Couplings |
1 |
0 |
1 |
0 |
0 |
2 |
294 |
Handling: Hand and Hoist-Line Implements |
0 |
0 |
0 |
1 |
1 |
2 |
310 |
Electrical Generator or Motor Structure |
0 |
0 |
0 |
0 |
2 |
2 |
318 |
Electricity: Motive Power Systems |
0 |
0 |
0 |
2 |
0 |
2 |
323 |
Electricity: Power Supply or Regulation Systems |
0 |
0 |
1 |
1 |
0 |
2 |
331 |
Oscillators |
0 |
0 |
1 |
0 |
1 |
2 |
403 |
Joints and Connections |
1 |
0 |
1 |
0 |
0 |
2 |
430 |
Radiation Imagery Chemistry: Process, Composition, or Product Thereof |
0 |
0 |
2 |
0 |
0 |
2 |
440 |
Marine Propulsion |
0 |
2 |
0 |
0 |
0 |
2 |
477 |
Interrelated Power Delivery Controls, Including Engine Control |
1 |
0 |
1 |
0 |
0 |
2 |
701 |
DP: Vehicles, Navigation, and Relative Location (Data Processing) |
1 |
0 |
0 |
1 |
0 |
2 |
704 |
DP: Speech Signal Processing, Linguistics, Language Translation, and Audio Compression/Decompression (Data Processing) |
0 |
0 |
0 |
1 |
1 |
2 |
717 |
DP: Software Development, Installation, and Management (Data Processing) |
0 |
0 |
1 |
1 |
0 |
2 |
004 |
Baths, Closets, Sinks, and Spittoons |
1 |
0 |
0 |
0 |
0 |
1 |
016 |
Miscellaneous Hardware |
0 |
0 |
0 |
1 |
0 |
1 |
026 |
Textiles: Cloth Finishing |
0 |
0 |
0 |
1 |
0 |
1 |
027 |
Undertaking |
1 |
0 |
0 |
0 |
0 |
1 |
030 |
Cutlery |
0 |
1 |
0 |
0 |
0 |
1 |
034 |
Drying and Gas or Vapor Contact with Solids |
1 |
0 |
0 |
0 |
0 |
1 |
040 |
Card, Picture, or Sign Exhibiting |
1 |
0 |
0 |
0 |
0 |
1 |
043 |
Fishing, Trapping, and Vermin Destroying |
0 |
1 |
0 |
0 |
0 |
1 |
047 |
Plant Husbandry |
0 |
1 |
0 |
0 |
0 |
1 |
048 |
Gas: Heating and Illuminating |
0 |
0 |
0 |
0 |
1 |
1 |
049 |
Movable or Removable Closures |
0 |
0 |
1 |
0 |
0 |
1 |
053 |
Package Making |
1 |
0 |
0 |
0 |
0 |
1 |
070 |
Locks |
0 |
1 |
0 |
0 |
0 |
1 |
083 |
Cutting |
0 |
0 |
0 |
1 |
0 |
1 |
091 |
Motors: Expansible Chamber Type |
0 |
0 |
1 |
0 |
0 |
1 |
100 |
Presses |
0 |
0 |
1 |
0 |
0 |
1 |
108 |
Horizontally Supported Planar Surfaces |
0 |
1 |
0 |
0 |
0 |
1 |
110 |
Furnaces |
0 |
1 |
0 |
0 |
0 |
1 |
117 |
Single-Crystal, Oriented-Crystal, and Epitaxy Growth Processes; Non-Coating Apparatus Therefor |
0 |
0 |
0 |
0 |
1 |
1 |
126 |
Stoves and Furnaces |
0 |
0 |
0 |
0 |
1 |
1 |
132 |
Toilet |
1 |
0 |
0 |
0 |
0 |
1 |
134 |
Cleaning and Liquid Contact with Solids |
0 |
0 |
0 |
1 |
0 |
1 |
150 |
Purses, Wallets, and Protective Covers |
0 |
1 |
0 |
0 |
0 |
1 |
159 |
Concentrating Evaporators |
0 |
0 |
0 |
0 |
1 |
1 |
162 |
Paper Making and Fiber Liberation |
0 |
0 |
0 |
0 |
1 |
1 |
165 |
Heat Exchange |
0 |
0 |
0 |
1 |
0 |
1 |
177 |
Weighing Scales |
0 |
0 |
1 |
0 |
0 |
1 |
180 |
Motor Vehicles |
0 |
0 |
0 |
1 |
0 |
1 |
181 |
Acoustics |
0 |
0 |
0 |
1 |
0 |
1 |
188 |
Brakes |
0 |
0 |
0 |
1 |
0 |
1 |
211 |
Supports: Racks |
1 |
0 |
0 |
0 |
0 |
1 |
222 |
Dispensing (apparatus and process) |
1 |
0 |
0 |
0 |
0 |
1 |
228 |
Metal Fusion Bonding |
0 |
0 |
1 |
0 |
0 |
1 |
244 |
Aeronautics and Astronautics |
0 |
0 |
0 |
1 |
0 |
1 |
254 |
Implements or Apparatus for Applying Pushing or Pulling Force |
0 |
0 |
0 |
1 |
0 |
1 |
266 |
Metallurgical Apparatus |
0 |
0 |
0 |
1 |
0 |
1 |
300 |
Brush, Broom, and Mop Making |
0 |
0 |
0 |
1 |
0 |
1 |
301 |
Land Vehicles: Wheels and Axles |
1 |
0 |
0 |
0 |
0 |
1 |
307 |
Electrical Transmission or Interconnection Systems |
0 |
0 |
0 |
1 |
0 |
1 |
315 |
Electric Lamp and Discharge Devices: Systems |
1 |
0 |
0 |
0 |
0 |
1 |
326 |
Electronic Digital Logic Circuitry |
0 |
0 |
0 |
1 |
0 |
1 |
330 |
Amplifiers |
0 |
0 |
0 |
1 |
0 |
1 |
349 |
Liquid Crystal Cells, Elements and Systems |
0 |
0 |
0 |
0 |
1 |
1 |
361 |
Electricity: Electrical Systems and Devices |
0 |
0 |
0 |
0 |
1 |
1 |
372 |
Coherent Light Generators |
1 |
0 |
0 |
0 |
0 |
1 |
373 |
Industrial Electric Heating Furnaces |
0 |
1 |
0 |
0 |
0 |
1 |
380 |
Cryptography |
0 |
0 |
0 |
1 |
0 |
1 |
398 |
Optical Communications |
1 |
0 |
0 |
0 |
0 |
1 |
404 |
Road Structure, Process, or Apparatus |
0 |
0 |
0 |
1 |
0 |
1 |
406 |
Conveyors: Fluid Current |
0 |
0 |
0 |
0 |
1 |
1 |
407 |
Cutters, for Shaping |
0 |
0 |
1 |
0 |
0 |
1 |
414 |
Material or Article Handling |
0 |
1 |
0 |
0 |
0 |
1 |
416 |
Fluid Reaction Surfaces (i.e., Impellers) |
0 |
0 |
0 |
1 |
0 |
1 |
419 |
Powder Metallurgy Processes |
0 |
0 |
0 |
1 |
0 |
1 |
420 |
Alloys or Metallic Compositions |
1 |
0 |
0 |
0 |
0 |
1 |
427 |
Coating Processes |
0 |
0 |
1 |
0 |
0 |
1 |
429 |
Chemistry: Electrical Current Producing Apparatus, Product, and Process |
1 |
0 |
0 |
0 |
0 |
1 |
431 |
Combustion |
0 |
0 |
0 |
0 |
1 |
1 |
445 |
Electric Lamp or Space Discharge Component or Device Manufacturing |
0 |
1 |
0 |
0 |
0 |
1 |
446 |
Amusement Devices: Toys |
0 |
1 |
0 |
0 |
0 |
1 |
452 |
Butchering |
0 |
0 |
1 |
0 |
0 |
1 |
454 |
Ventilation |
0 |
0 |
1 |
0 |
0 |
1 |
473 |
Games Using Tangible Projectile |
0 |
0 |
0 |
0 |
1 |
1 |
501 |
Compositions: Ceramic |
0 |
0 |
0 |
1 |
0 |
1 |
510 |
Cleaning Compositions for Solid Surfaces, Auxiliary Compositions Therefor, or Processes of Preparing the Compositions |
0 |
0 |
1 |
0 |
0 |
1 |
585 |
Chemistry of Hydrocarbon Compounds |
1 |
0 |
0 |
0 |
0 |
1 |
601 |
Surgery: Kinesitherapy |
0 |
1 |
0 |
0 |
0 |
1 |
706 |
DP: Artificial Intelligence (Data Processing) |
0 |
0 |
0 |
0 |
1 |
1 |
716 |
DP: Design and Analysis of Circuit or Semiconductor Mask (Data Processing) |
0 |
0 |
1 |
0 |
0 |
1 |
719 |
Interprogram Communication or Interprocess Communication (Ipc) (Electrical Computers and Digital Processing Systems) |
0 |
1 |
0 |
0 |
0 |
1 |
726 |
Information Security |
0 |
0 |
0 |
1 |
0 |
1 |
800 |
Multicellular Living Organisms and Unmodified Parts Thereof and Related Processes |
0 |
0 |
0 |
1 |
0 |
1 |
ALL |
ALL CLASSES |
243 |
220 |
244 |
247 |
273 |
1227 |