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U.S. PATENT AND TRADEMARK OFFICE
Patent Technology Monitoring Team (PTMT)

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

Count of 2011 - 2015 Utility Patent Grants
As Distributed 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

VIRGINIA

( patent origin is determined by the residence of the first-named inventor )
( technology class is determined by the primary classification assigned to a patent- see 'Explanation of Data' )
( some classes have been combined together under a single class identifier )

The following table displays technology classes and counts of utility patents classified in them; patents are distributed by year of patent grant.
Class Class Title 2011 2012 2013 2014 2015 Total
370 Multiplex Communications 83 78 103 98 145 507
709 Multicomputer Data Transferring (Electrical Computers and Digital Processing Systems) 82 91 97 129 104 503
455 Telecommunications 94 105 97 82 94 472
705 DP: Financial, Business Practice, Management, or Cost/Price Determination (Data Processing) 107 96 115 91 31 440
726 Information Security 27 37 59 92 104 319
707 DP: Database and File Management or Data Structures (Data Processing) 52 40 48 50 87 277
424 Drug, Bio-Affecting and Body Treating Compositions (includes Class 514) 48 55 49 50 59 261
340 Communications: Electrical 22 28 30 45 34 159
131 Tobacco 25 23 35 30 43 156
382 Image Analysis 22 26 39 34 29 150
715 DP: Presentation Processing of Document, Operator Interface Processing, and Screen Saver Display Processing (Data Processing) 11 25 29 44 39 148
713 Support (Electrical Computers and Digital Processing Systems) 18 21 23 36 33 131
435 Chemistry: Molecular Biology and Microbiology 18 17 35 34 26 130
701 DP: Vehicles, Navigation, and Relative Location (Data Processing) 11 19 26 29 26 111
250 Radiant Energy 23 19 22 24 17 105
356 Optics: Measuring and Testing 16 20 23 23 23 105
128 Surgery (includes Class 600) 23 21 15 30 15 104
428 Stock Material or Miscellaneous Articles 20 22 13 27 21 103
606 Surgery (instruments) 3 16 22 23 36 100
375 Pulse or Digital Communications 13 18 16 24 27 98
379 Telephonic Communications 17 15 17 20 20 89
348 Television 6 11 15 20 35 87
520 Synthetic Resins or Natural Rubbers (includes Classes 520-528) 16 13 10 24 24 87
345 Computer Graphics Processing and Selective Visual Display Systems 12 14 17 17 20 80
702 DP: Measuring, Calibrating, or Testing (Data Processing) 19 12 11 21 17 80
532 Organic Compounds (includes Classes 532-570) 11 12 25 12 16 76
706 DP: Artificial Intelligence (Data Processing) 12 17 23 11 13 76
700 DP: Generic Control Systems or Specific Applications (Data Processing) 13 16 15 15 13 72
257 Active Solid-State Devices (e.g., Transistors, Solid-State Diodes) 13 13 14 16 13 69
725 Interactive Video Distribution Systems 6 9 13 22 19 69
264 Plastic and Nonmetallic Article Shaping or Treating: Processes 18 12 15 12 11 68
361 Electricity: Electrical Systems and Devices 5 13 10 20 19 67
073 Measuring and Testing 10 10 13 15 17 65
351 Optics: Eye Examining, Vision Testing and Correcting 14 10 12 14 13 63
235 Registers (e.g., cash registers, calculators, devices for counting movements of devices, etc.) 13 7 19 9 13 61
342 Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation) 19 18 11 6 6 60
438 Semiconductor Device Manufacturing: Process 17 8 13 16 6 60
244 Aeronautics and Astronautics 9 16 12 9 13 59
362 Illumination 12 19 10 12 5 58
052 Static Structures (e.g., Buildings) 9 11 19 11 7 57
359 Optical: Systems and Elements 6 16 7 16 11 56
042 Firearms 5 12 14 12 12 55
714 Error Detection/Correction and Fault Detection/Recovery 5 10 15 14 11 55
604 Surgery (Medicators and Receptors) 8 12 13 11 9 53
089 Ordnance 13 13 6 13 7 52
508 Solid Anti-Friction Devices, Materials Therefor, Lubricant or Separant Compositions for Moving Solid Surfaces, and Miscellaneous Mineral Oil Compositions 16 10 9 6 10 51
206 Special Receptacle or Package 11 8 11 10 10 50
102 Ammunition and Explosives 12 8 8 10 11 49
002 Apparel 8 12 6 13 9 48
717 DP: Software Development, Installation, and Management (Data Processing) 8 7 9 11 13 48
029 Metal Working 12 6 9 7 13 47
044 Fuel and Related Compositions 4 6 8 16 11 45
324 Electricity: Measuring and Testing 16 7 3 12 7 45
422 Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing 10 9 8 2 13 42
434 Education and Demonstration 4 7 11 15 4 41
280 Land Vehicles 3 9 9 7 12 40
210 Liquid Purification or Separation 9 6 5 9 9 38
220 Receptacles 1 5 7 13 12 38
315 Electric Lamp and Discharge Devices: Systems 3 5 7 6 15 36
473 Games Using Tangible Projectile 8 7 9 6 6 36
482 Exercise Devices 11 2 6 8 8 35
704 DP: Speech Signal Processing, Linguistics, Language Translation, and Audio Compression/Decompression (Data Processing) 3 11 7 7 7 35
114 Ships 4 9 9 4 8 34
385 Optical Waveguides 4 5 7 7 11 34
718 Virtual Machine Task or Process Management or Task Management/Control (Electrical Computers and Digital Processing Systems) 0 8 6 10 10 34
005 Beds 4 5 8 9 7 33
427 Coating Processes 7 10 1 10 5 33
423 Chemistry of Inorganic Compounds 1 8 7 10 6 32
060 Power Plants 5 8 6 4 8 31
248 Supports (e.g., for holding articles, etc.) 5 8 4 4 10 31
290 Prime-Mover Dynamo Plants 7 7 3 10 4 31
372 Coherent Light Generators 6 5 8 8 4 31
442 Fabric (Woven, Knitted, or Nonwoven Textile or Cloth, Etc.) 11 6 3 5 6 31
623 Prosthesis (i.e., Artificial Body Members), Parts Thereof, or Aids and Accessories Therefor 4 6 5 9 7 31
703 DP: Structural Design, Modeling, Simulation, and Emulation (Data Processing) 9 10 1 7 4 31
310 Electrical Generator or Motor Structure 5 4 6 10 5 30
365 Static Information Storage and Retrieval 12 8 4 3 3 30
463 Amusement Devices: Games 5 5 6 9 5 30
137 Fluid Handling 2 4 8 9 6 29
363 Electric Power Conversion Systems 8 4 3 7 7 29
123 Internal-Combustion Engines 4 4 7 4 8 27
156 Adhesive Bonding and Miscellaneous Chemical Manufacture 6 4 5 5 6 26
343 Communications: Radio Wave Antennas 3 3 8 4 7 25
436 Chemistry: Analytical and Immunological Testing 10 3 6 5 1 25
239 Fluid Sprinkling, Spraying, and Diffusing 5 3 4 6 6 24
318 Electricity: Motive Power Systems 5 5 2 9 3 24
380 Cryptography 2 7 9 3 3 24
585 Chemistry of Hydrocarbon Compounds 5 7 6 3 3 24
251 Valves and Valve Actuation 1 5 6 2 9 23
062 Refrigeration 6 1 3 4 8 22
198 Conveyors: Power-Driven 6 1 3 7 5 22
204 Chemistry: Electrical and Wave Energy 1 7 6 3 5 22
252 Compositions 5 2 5 6 4 22
307 Electrical Transmission or Interconnection Systems 4 2 5 6 5 22
414 Material or Article Handling 3 2 2 6 9 22
530 Chemistry: Natural Resins or Derivatives; Peptides or Proteins; Lignins or Reaction Products Thereof 3 5 4 5 5 22
040 Card, Picture, or Sign Exhibiting 5 6 4 5 1 21
119 Animal Husbandry 3 3 5 4 5 20
175 Boring or Penetrating the Earth 3 4 3 5 5 20
208 Mineral Oils: Processes and Products 1 2 7 6 4 20
333 Wave Transmission Lines and Networks 4 5 2 6 3 20
015 Brushing, Scrubbing, and General Cleaning 6 0 3 3 7 19
297 Chairs and Seats 3 5 3 5 3 19
376 Induced Nuclear Reactions: Processes, Systems, and Elements 0 2 2 10 5 19
398 Optical Communications 2 4 6 4 3 19
033 Geometrical Instruments 4 7 2 3 2 18
095 Gas Separation: Processes 3 3 2 5 5 18
162 Paper Making and Fiber Liberation 0 8 5 1 4 18
219 Electric Heating 4 3 6 4 1 18
224 Package and Article Carriers 3 3 4 3 5 18
426 Food or Edible Material: Processes, Compositions, and Products 3 2 1 3 9 18
607 Surgery: Light, Thermal, and Electrical Application 1 1 5 3 8 18
708 Arithmetic Processing and Calculating (Electrical Computers) 8 2 5 2 1 18
710 Input/Output (Electrical Computers and Digital Data Processing Systems) 4 0 5 6 3 18
053 Package Making 1 4 8 1 3 17
358 Facsimile and Static Presentation Processing 5 3 1 4 4 17
366 Agitating (e.g., of articles and materials) 8 3 2 2 2 17
439 Electrical Connectors 3 2 3 3 6 17
800 Multicellular Living Organisms and Unmodified Parts Thereof and Related Processes 4 5 5 2 1 17
072 Metal Deforming 3 1 4 5 3 16
099 Foods and Beverages: Apparatus 2 4 2 8 0 16
124 Mechanical Guns and Projectors 2 5 2 5 2 16
181 Acoustics 2 7 6 0 1 16
299 Mining or In Situ Disintegration of Hard Material 3 2 7 4 0 16
425 Plastic Article or Earthenware Shaping or Treating: Apparatus 3 3 1 6 3 16
084 Music 3 4 3 3 2 15
134 Cleaning and Liquid Contact with Solids 2 1 8 1 3 15
180 Motor Vehicles 2 4 3 5 1 15
211 Supports: Racks 2 3 4 4 2 15
313 Electric Lamp and Discharge Devices 4 3 3 2 3 15
381 Electrical Audio Signal Processing Systems and Devices 1 9 1 2 2 15
222 Dispensing (apparatus and process) 0 4 4 2 4 14
336 Inductor Devices 1 3 3 3 4 14
367 Communications, Electrical: Acoustic Wave Systems and Devices 6 3 2 0 3 14
405 Hydraulic and Earth Engineering 1 0 4 7 2 14
043 Fishing, Trapping, and Vermin Destroying 2 2 3 2 4 13
055 Gas Separation 1 3 3 3 3 13
261 Gas and Liquid Contact Apparatus 2 2 1 3 5 13
416 Fluid Reaction Surfaces (i.e., Impellers) 4 5 2 1 1 13
429 Chemistry: Electrical Current Producing Apparatus, Product, and Process 5 1 3 4 0 13
602 Surgery: Splint, Brace, or Bandage 5 2 1 4 1 13
719 Interprogram Communication or Interprocess Communication (Ipc) (Electrical Computers and Digital Processing Systems) 1 4 2 3 3 13
174 Electricity: Conductors and Insulators 3 1 4 3 1 12
209 Classifying, Separating, and Assorting Solids 2 0 2 3 5 12
229 Envelopes, Wrappers, and Paperboard Boxes 2 1 4 1 4 12
454 Ventilation 0 3 3 4 2 12
493 Manufacturing Container or Tube From Paper; or Other Manufacturing From a Sheet or Web 2 2 3 0 5 12
004 Baths, Closets, Sinks, and Spittoons 2 4 1 2 2 11
165 Heat Exchange 1 1 2 0 7 11
182 Fire Escape, Ladder, or Scaffold 3 2 2 3 1 11
221 Article Dispensing 1 2 2 3 3 11
273 Amusement Devices: Games 3 0 3 2 3 11
296 Land Vehicles: Bodies and Tops 2 2 2 4 1 11
331 Oscillators 0 1 7 2 1 11
410 Freight Accommodation On Freight Carrier 1 2 6 1 1 11
711 Memory (Electrical Computers and Digital Processing Systems) 4 0 0 4 3 11
136 Batteries: Thermoelectric and Photoelectric 1 1 4 1 3 10
327 Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems 1 0 1 4 4 10
335 Electricity: Magnetically Operated Switches, Magnets, and Electromagnets 0 3 4 1 2 10
396 Photography 3 0 1 5 1 10
502 Catalyst, Solid Sorbent, or Support Therefor: Product or Process of Making 2 2 2 2 2 10
024 Buckles, Buttons, Clasps, Etc. 0 4 2 1 2 9
030 Cutlery 4 1 2 1 1 9
070 Locks 1 3 2 0 3 9
096 Gas Separation: Apparatus 3 1 0 1 4 9
138 Pipes and Tubular Conduits 3 2 0 1 3 9
166 Wells (shafts or deep borings in the earth, e.g., for oil and gas) 1 3 2 1 2 9
294 Handling: Hand and Hoist-Line Implements 1 2 4 1 1 9
374 Thermal Measuring and Testing 0 1 1 4 3 9
384 Bearings 1 2 4 1 1 9
415 Rotary Kinetic Fluid Motors or Pumps 2 3 2 2 0 9
441 Buoys, Rafts, and Aquatic Devices 1 1 2 1 4 9
588 Hazardous or Toxic Waste Destruction or Containment 5 2 1 0 1 9
075 Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures 1 2 1 2 2 8
106 Compositions: Coating or Plastic 2 0 1 2 3 8
117 Single-Crystal, Oriented-Crystal, and Epitaxy Growth Processes; Non-Coating Apparatus Therefor 1 3 2 1 1 8
320 Electricity: Battery or Capacitor Charging or Discharging 2 1 2 1 2 8
323 Electricity: Power Supply or Regulation Systems 0 1 1 2 4 8
349 Liquid Crystal Cells, Elements and Systems 2 0 1 2 3 8
510 Cleaning Compositions for Solid Surfaces, Auxiliary Compositions Therefor, or Processes of Preparing the Compositions 2 0 3 3 0 8
047 Plant Husbandry 1 0 1 2 3 7
074 Machine Element or Mechanism 0 0 2 2 3 7
083 Cutting 1 1 2 1 2 7
105 Railway Rolling Stock 2 2 2 1 0 7
148 Metal Treatment 0 3 1 0 3 7
254 Implements or Apparatus for Applying Pushing or Pulling Force 2 2 3 0 0 7
312 Supports: Cabinet Structure 0 0 0 5 2 7
401 Coating Implements with Material Supply 1 0 1 4 1 7
417 Pumps 1 2 2 0 2 7
038 Textiles: Ironing or Smoothing 0 2 2 0 2 6
057 Textiles: Spinning, Twisting, and Twining 3 1 1 1 0 6
071 Chemistry: Fertilizers 2 0 0 3 1 6
082 Turning (e.g., for metal working) 2 3 1 0 0 6
126 Stoves and Furnaces 0 2 1 2 1 6
216 Etching a Substrate: Processes 3 1 0 2 0 6
228 Metal Fusion Bonding 0 0 1 4 1 6
241 Solid Material Comminution or Disintegration 1 0 3 1 1 6
277 Seal for a Joint or Juncture 0 0 1 3 2 6
368 Horology: Time Measuring Systems or Devices 3 0 2 1 0 6
378 X-Ray or Gamma Ray Systems or Devices 2 1 1 1 1 6
386 Motion Video Signal Processing for Recording or Reproducing 1 1 1 2 1 6
712 Processing Architectures and Instruction Processing, e.g., Processors (Electrical Computers and Digital Processing Systems) 2 3 0 0 1 6
716 Computer-Aided Design and Analysis of Circuits and Semiconductor Masks 2 1 0 1 2 6
034 Drying and Gas or Vapor Contact with Solids 0 2 1 1 1 5
036 Boots, Shoes, and Leggings 2 0 1 1 1 5
049 Movable or Removable Closures 0 0 1 2 2 5
063 Jewelry 2 1 1 1 0 5
066 Textiles: Knitting 5 0 0 0 0 5
132 Toilet 1 0 1 0 3 5
205 Electrolysis: Processes, Compositions Used Therein, and Methods of Preparing the Compositions 1 0 1 1 2 5
326 Electronic Digital Logic Circuitry 2 0 0 0 3 5
341 Coded Data Generation or Conversion 1 0 1 3 0 5
506 Combinatorial Chemistry Technology: Method, Library, Apparatus 0 0 0 0 5 5
601 Surgery: Kinesitherapy 0 3 1 0 1 5
008 Bleaching and Dyeing; Fluid Treatment and Chemical Modification of Textiles and Fibers 0 1 1 2 0 4
048 Gas: Heating and Illuminating 1 1 2 0 0 4
056 Harvesters 1 0 0 2 1 4
065 Glass Manufacturing 1 2 0 1 0 4
081 Tools 1 1 1 1 0 4
116 Signals and Indicators 1 2 0 0 1 4
122 Liquid Heaters and Vaporizers 1 2 1 0 0 4
127 Sugar, Starch, and Carbohydrates 0 0 0 4 0 4
135 Tent, Canopy, Umbrella, or Cane 2 0 1 0 1 4
141 Fluent Material Handling, with Receiver or Receiver Coacting Means 0 0 1 1 2 4
144 Woodworking 1 2 0 1 0 4
149 Explosive and Thermic Compositions or Charges 0 3 1 0 0 4
160 Flexible or Portable Closure, Partition, or Panel 1 0 0 1 2 4
215 Bottles and Jars 0 1 1 1 1 4
246 Railway Switches and Signals 0 1 1 1 1 4
292 Closure Fasteners 1 2 0 0 1 4
353 Optics: Image Projectors 0 1 1 2 0 4
400 Typewriting Machines 2 0 1 1 0 4
403 Joints and Connections 1 0 1 1 1 4
404 Road Structure, Process, or Apparatus 0 1 3 0 0 4
411 Expanded, Threaded, Driven, Headed, Tool-Deformed, or Locked-Threaded Fastener 2 0 1 0 1 4
440 Marine Propulsion 2 0 0 0 2 4
446 Amusement Devices: Toys 0 0 0 0 4 4
450 Foundation Garments 0 1 1 2 0 4
451 Abrading 0 1 1 1 1 4
505 Superconductor Technology: Apparatus, Material, Process 0 0 0 2 2 4
014 Bridges 0 1 0 1 1 3
027 Undertaking 1 0 0 0 2 3
101 Printing 0 0 0 1 2 3
104 Railways 1 0 0 1 1 3
108 Horizontally Supported Planar Surfaces 0 0 1 1 1 3
118 Coating Apparatus 0 1 1 0 1 3
150 Purses, Wallets, and Protective Covers 1 1 0 0 1 3
164 Metal Founding 0 2 0 1 0 3
169 Fire Extinguishers 0 1 1 1 0 3
188 Brakes 0 0 0 3 0 3
190 Trunks and Hand-Carried Luggage 0 0 0 1 2 3
193 Conveyors, Chutes, Skids, Guides, and Ways 0 0 0 2 1 3
270 Sheet-Material Associating 2 1 0 0 0 3
322 Electricity: Single Generator Systems 0 0 0 1 2 3
330 Amplifiers 1 0 1 0 1 3
392 Electric Resistance Heating Devices 0 0 1 2 0 3
399 Electrophotography 0 2 0 0 1 3
430 Radiation Imagery Chemistry: Process, Composition, or Product Thereof 0 0 3 0 0 3
431 Combustion 0 0 1 2 0 3
433 Dentistry 0 0 0 2 1 3
475 Planetary Gear Transmission Systems or Components 1 1 1 0 0 3
501 Compositions: Ceramic 0 0 1 0 2 3
518 Chemistry: Fischer-Tropsch Processes; or Purification or Recovery of Products Thereof 1 1 1 0 0 3
007 Compound Hand Tools 0 0 0 0 2 2
016 Miscellaneous Hardware (e.g., Bushing, Carpet Fastener, Caster, Door Closer, Panel Hanger, Attachable or Adjunct Handle, Hinge, Window Sash Balance, Etc.) 1 0 0 1 0 2
091 Motors: Expansible Chamber Type 0 0 1 0 1 2
112 Sewing 1 0 1 0 0 2
172 Earth Working 1 1 0 0 0 2
173 Tool Driving or Impacting 1 0 1 0 0 2
227 Elongated-Member-Driving Apparatus 2 0 0 0 0 2
242 Winding, Tensioning, or Guiding 1 0 1 0 0 2
256 Fences 0 0 0 1 1 2
266 Metallurgical Apparatus 0 0 0 2 0 2
269 Work Holders 0 0 1 0 1 2
271 Sheet Feeding or Delivering 1 1 0 0 0 2
285 Pipe Joints or Couplings 0 0 0 2 0 2
301 Land Vehicles: Wheels and Axles 0 0 1 0 1 2
338 Electrical Resistors 0 1 1 0 0 2
360 Dynamic Magnetic Information Storage or Retrieval 1 0 0 0 1 2
369 Dynamic Information Storage or Retrieval 1 0 0 0 1 2
383 Flexible Bags 0 0 1 0 1 2
418 Rotary Expansible Chamber Devices 1 0 0 0 1 2
419 Powder Metallurgy Processes 0 0 1 0 1 2
420 Alloys or Metallic Compositions 0 1 1 0 0 2
445 Electric Lamp or Space Discharge Component or Device Manufacturing 1 1 0 0 0 2
472 Amusement Devices 0 1 1 0 0 2
492 Roll or Roller 0 0 1 0 1 2
504 Plant Protecting and Regulating Compositions 1 0 0 1 0 2
019 Textiles: Fiber Preparation 0 0 0 1 0 1
037 Excavating 0 0 0 0 1 1
051 Abrasive Tool Making Process, Material, or Composition 0 1 0 0 0 1
086 Ammunition and Explosive-Charge Making 0 0 0 1 0 1
087 Textiles: Braiding, Netting, and Lace Making 0 0 1 0 0 1
092 Expansible Chamber Devices 0 0 1 0 0 1
100 Presses 0 0 0 0 1 1
110 Furnaces 0 1 0 0 0 1
111 Planting 0 0 0 1 0 1
152 Resilient Tires and Wheels 0 0 0 0 1 1
177 Weighing Scales 0 0 0 1 0 1
184 Lubrication 0 0 1 0 0 1
186 Merchandising 1 0 0 0 0 1
191 Electricity: Transmission To Vehicles 1 0 0 0 0 1
196 Mineral Oils: Apparatus 0 1 0 0 0 1
200 Electricity: Circuit Makers and Breakers 0 0 0 0 1 1
201 Distillation: Processes, Thermolytic 0 0 0 0 1 1
202 Distillation: Apparatus 1 0 0 0 0 1
203 Distillation: Processes, Separatory 0 1 0 0 0 1
212 Traversing Hoists 1 0 0 0 0 1
218 High-Voltage Switches with Arc Preventing or Extinguishing Devices 0 0 0 1 0 1
223 Apparel Apparatus 0 0 0 1 0 1
225 Severing by Tearing or Breaking 0 0 0 1 0 1
232 Deposit and Collection Receptacles 0 0 1 0 0 1
267 Spring Devices 0 0 0 1 0 1
279 Chucks or Sockets 0 0 1 0 0 1
281 Books, Strips, and Leaves 0 1 0 0 0 1
298 Land Vehicles: Dumping 0 0 1 0 0 1
303 Fluid-Pressure and Analogous Brake Systems 1 0 0 0 0 1
332 Modulators 0 0 0 1 0 1
373 Industrial Electric Heating Furnaces 0 0 1 0 0 1
406 Conveyors: Fluid Current 0 0 0 0 1 1
409 Gear Cutting, Milling, or Planing 0 0 0 0 1 1
413 Sheet Metal Container Making 0 0 0 0 1 1
452 Butchering 0 1 0 0 0 1
460 Crop Threshing or Separating 0 0 0 0 1 1
476 Friction Gear Transmission Systems or Components 0 1 0 0 0 1
494 Imperforate Bowl: Centrifugal Separators 0 0 0 1 0 1
850 Scanning-Probe Techniques or Apparatus; Applications of Scanning-Probe Techniques, e.g., Scanning Probe Microscopy [Spm] 0 1 0 0 0 1
ALL ALL CLASSES 1600 1691 1886 2078 2057 9312



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email: oeip@uspto.gov

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