U.S. PATENT AND TRADEMARK OFFICE
Information Products Division
Technology Assessment and Forecast (TAF) Branch

Patenting By Geographic Region (State and Country), Breakout By Technology Class
Count of 1997 - 2001 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

MARYLAND

(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')
 
Class Class Title 1997 1998 1999 2000 2001 Total
424 Drug, Bio-Affecting and Body Treating Compositions (includes Class 514) 156 168 212 164 192 892
435 Chemistry: Molecular Biology and Microbiology 120 177 202 164 170 833
128 Surgery (includes Class 600) 29 32 25 41 42 169
530 Chemistry: Natural Resins or Derivatives; Peptides or Proteins; Lignins or Reaction Products Thereof 20 25 42 25 25 137
532 Organic Compounds (includes Classes 532-570) 26 19 28 17 27 117
606 Surgery (instruments) 29 34 28 16 10 117
359 Optics: Systems (Including Communication) and Elements 13 20 18 25 31 107
428 Stock Material or Miscellaneous Articles 15 25 19 17 18 94
455 Telecommunications 9 21 14 21 25 90
342 Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation) 8 16 26 21 17 88
370 Multiplex Communications 15 25 14 13 19 86
604 Surgery (Medicators and Receptors) 23 23 12 9 15 82
340 Communications: Electrical 17 18 12 11 20 78
356 Optics: Measuring and Testing 11 20 21 16 7 75
385 Optical Waveguides 9 20 15 12 18 74
375 Pulse or Digital Communications 11 12 18 14 14 69
520 Synthetic Resins or Natural Rubbers (includes Classes 520-528) 19 11 21 7 11 69
073 Measuring and Testing 11 15 14 11 15 66
436 Chemistry: Analytical and Immunological Testing 13 12 17 5 16 63
250 Radiant Energy 11 15 8 14 9 57
707 DP: Database and File Management, Data Structures, Or Document Processing (Data Processing) 5 14 16 8 14 57
379 Telephonic Communications 14 15 10 10 7 56
102 Ammunition and Explosives 14 9 8 7 15 53
324 Electricity: Measuring and Testing 6 7 12 14 14 53
422 Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing 5 17 12 10 9 53
709 Multiple Computer or Process Coordinating (Electrical Computers and Digital Processing Systems) 7 10 13 12 9 51
800 Multicellular Living Organisms and Unmodified Parts Thereof and Related Processes 8 12 20 5 6 51
705 DP: Financial, Business Practice, Management, or Cost/Price Determination (Data Processing) 3 6 15 14 12 50
210 Liquid Purification or Separation 17 12 8 2 8 47
052 Static Structures (e.g., Buildings) 12 6 9 10 9 46
426 Food or Edible Material: Processes, Compositions, and Products 6 6 10 9 15 46
382 Image Analysis 4 11 13 7 7 42
083 Cutting 2 6 12 12 9 41
257 Active Solid-State Devices (e.g., Transistors, Solid-State Diodes) 5 11 11 7 7 41
315 Electric Lamp and Discharge Devices: Systems 1 14 14 4 8 41
002 Apparel 7 8 8 5 11 39
156 Adhesive Bonding and Miscellaneous Chemical Manufacture 7 8 10 7 6 38
252 Compositions 9 9 10 5 5 38
713 Support (Electrical Computers and Digital Processing Systems) 7 4 8 10 9 38
351 Optics: Eye Examining, Vision Testing and Correcting 5 9 9 8 6 37
502 Catalyst, Solid Sorbent, or Support Therefor: Product or Process of Making 4 6 9 9 9 37
702 DP: Measuring, Calibrating, or Testing (Data Processing) 8 7 6 8 8 37
482 Exercise Devices 5 4 7 11 8 35
206 Special Receptacle or Package 5 5 7 14 2 33
313 Electric Lamp and Discharge Devices 7 9 6 7 4 33
427 Coating Processes 10 7 5 4 7 33
438 Semiconductor Device Manufacturing: Process 3 6 2 10 11 32
114 Ships 4 6 4 8 9 31
343 Communications: Radio Wave Antennas 3 8 11 5 3 30
362 Illumination 2 5 7 9 7 30
704 DP: Speech Signal Processing, Linguistics, Language Translation, and Audio Compression/Decompression (Data Processing) 9 5 9 2 5 30
714 Error Detection/Correction and Fault Detection/Recovery 6 2 4 6 12 30
030 Cutlery 1 8 5 5 10 29
062 Refrigeration 9 5 3 5 7 29
106 Compositions: Coating or Plastic 6 12 4 2 5 29
029 Metal Working 4 9 4 3 8 28
119 Animal Husbandry 5 5 10 1 6 27
222 Dispensing (apparatus and process) 7 2 5 6 7 27
239 Fluid Sprinkling, Spraying, and Diffusing 4 4 6 7 6 27
345 Computer Graphics Processing, Operator Interface Processing, and Selective Visual Display Systems 4 6 5 3 9 27
089 Ordnance 6 4 9 2 5 26
244 Aeronautics 2 5 6 7 6 26
248 Supports (e.g., for holding articles, etc.) 7 7 2 6 4 26
280 Land Vehicles 4 4 9 5 4 26
320 Electricity: Battery or Capacitor Charging or Discharging 3 5 6 6 6 26
473 Games Using Tangible Projectile 11 7 3 4 1 26
623 Prosthesis (i.e., Artificial Body Members), Parts Thereof, or Aids and Accessories Therefor 7 5 2 5 6 25
132 Toilet 6 5 6 4 3 24
264 Plastic and Nonmetallic Article Shaping or Treating: Processes 5 7 3 6 3 24
429 Chemistry: Electrical Current Producing Apparatus, Product, and Process 5 8 3 3 5 24
700 DP: Generic Control Systems or Specific Applications (Data Processing) 2 5 5 6 6 24
015 Brushing, Scrubbing, and General Cleaning 6 4 3 8 2 23
137 Fluid Handling 3 5 6 3 6 23
273 Amusement Devices: Games 3 3 5 5 7 23
725 Interactive Video Distribution Systems 8 6 3 3 3 23
005 Beds 5 2 5 5 5 22
310 Electrical Generator or Motor Structure 4 5 2 5 6 22
423 Chemistry of Inorganic Compounds 6 3 6 3 3 21
607 Surgery: Light, Thermal, and Electrical Application 0 2 4 9 6 21
706 DP: Artificial Intelligence (Data Processing) 4 9 4 3 1 21
056 Harvesters 2 4 2 6 6 20
348 Television 5 8 3 1 3 20
380 Cryptography 3 3 1 5 8 20
434 Education and Demonstration 3 2 4 4 7 20
065 Glass Manufacturing 1 3 8 4 3 19
297 Chairs and Seats 4 4 2 5 4 19
333 Wave Transmission Lines and Networks 3 3 7 4 2 19
588 Hazardous or Toxic Waste Destruction or Containment 3 3 5 4 4 19
220 Receptacles 2 2 2 5 7 18
701 DP: Vehicles, Navigation, and Relative Location (Data Processing) 0 3 3 7 5 18
123 Internal-Combustion Engines 3 0 7 2 5 17
198 Conveyors: Power-Driven 4 2 4 4 3 17
433 Dentistry 4 2 3 2 6 17
024 Buckles, Buttons, Clasps, Etc. 1 0 3 4 8 16
211 Supports: Racks 7 1 0 1 7 16
219 Electric Heating 1 7 3 3 2 16
224 Package and Article Carriers 3 3 4 3 3 16
229 Envelopes, Wrappers, and Paperboard Boxes 3 1 3 5 4 16
381 Electrical Audio Signal Processing Systems and Devices 4 8 2 1 1 16
134 Cleaning and Liquid Contact with Solids 2 2 2 7 2 15
141 Fluent Material Handling, with Receiver or Receiver Coacting Means 1 2 7 3 2 15
204 Chemistry: Electrical and Wave Energy 4 2 2 4 3 15
361 Electricity: Electrical Systems and Devices 1 2 5 3 4 15
408 Cutting by Use of Rotating Axially Moving Tool 1 2 1 5 6 15
493 Manufacturing Container or Tube From Paper; or Other Manufacturing From a Sheet or Web 4 3 1 6 1 15
602 Surgery: Splint, Brace, or Bandage 1 1 3 6 4 15
004 Baths, Closets, Sinks, and Spittoons 4 4 5 0 1 14
081 Tools 0 3 3 5 3 14
144 Woodworking 0 2 7 2 3 14
149 Explosive and Thermic Compositions or Charges 0 1 5 3 5 14
363 Electric Power Conversion Systems 3 4 2 5 0 14
367 Communications, Electrical: Acoustic Wave Systems and Devices 7 1 1 1 4 14
372 Coherent Light Generators 2 5 1 5 1 14
378 X-Ray or Gamma Ray Systems or Devices 1 2 3 2 6 14
430 Radiation Imagery Chemistry: Process, Composition, or Product Thereof 1 2 3 5 3 14
501 Compositions: Ceramic 6 2 2 4 0 14
033 Geometrical Instruments 3 6 2 1 1 13
070 Locks 4 1 4 2 2 13
174 Electricity: Conductors and Insulators 0 1 5 5 2 13
235 Registers (e.g., cash registers, calculators, devices for counting movements of devices, etc.) 0 1 4 5 3 13
327 Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems 3 5 1 4 0 13
451 Abrading 0 1 4 5 3 13
043 Fishing, Trapping, and Vermin Destroying 2 3 2 2 3 12
165 Heat Exchange 2 5 2 2 1 12
173 Tool Driving or Impacting 2 3 0 1 6 12
181 Acoustics 4 2 1 4 1 12
200 Electricity: Circuit Makers and Breakers 1 2 2 5 2 12
208 Mineral Oils: Processes and Products 2 0 2 7 1 12
277 Seal for a Joint or Juncture 1 7 1 2 1 12
405 Hydraulic and Earth Engineering 1 6 0 4 1 12
446 Amusement Devices: Toys 5 6 0 0 1 12
016 Miscellaneous Hardware 3 2 2 1 3 11
040 Card, Picture, or Sign Exhibiting 5 0 1 3 2 11
042 Firearms 1 3 3 1 3 11
053 Package Making 0 0 2 2 7 11
118 Coating Apparatus 2 2 1 3 3 11
160 Flexible or Portable Closure, Partition, or Panel 3 1 4 1 2 11
162 Paper Making and Fiber Liberation 2 3 0 4 2 11
180 Motor Vehicles 0 0 4 3 4 11
205 Electrolysis: Processes, Compositions Used Therein, and Methods of Preparing the Compositions 1 3 0 2 5 11
307 Electrical Transmission or Interconnection Systems 2 3 2 3 1 11
403 Joints and Connections 1 4 2 2 2 11
425 Plastic Article or Earthenware Shaping or Treating: Apparatus 2 6 1 0 2 11
034 Drying and Gas or Vapor Contact with Solids 2 1 3 2 2 10
060 Power Plants 2 0 1 1 6 10
096 Gas Separation: Apparatus 4 4 0 0 2 10
221 Article Dispensing 0 2 3 1 4 10
330 Amplifiers 2 1 3 2 2 10
341 Coded Data Generation or Conversion 1 1 0 6 2 10
374 Thermal Measuring and Testing 0 4 1 3 2 10
440 Marine Propulsion 3 0 3 2 2 10
124 Mechanical Guns and Projectors 2 0 2 3 2 9
242 Winding, Tensioning, or Guiding 1 1 4 1 2 9
294 Handling: Hand and Hoist-Line Implements 2 4 1 1 1 9
318 Electricity: Motive Power Systems 2 3 1 2 1 9
365 Static Information Storage and Retrieval 0 1 0 3 5 9
439 Electrical Connectors 1 1 3 0 4 9
075 Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures 0 3 2 2 1 8
241 Solid Material Comminution or Disintegration 1 3 1 0 3 8
303 Fluid-Pressure and Analogous Brake Systems 0 0 4 2 2 8
703 DP: Structural Design, Modeling, Simulation, and Emulation (Data Processing) 2 1 3 0 2 8
036 Boots, Shoes, and Leggings 2 3 1 0 1 7
044 Fuel and Related Compositions 1 1 1 3 1 7
074 Machine Element or Mechanism 0 0 4 3 0 7
084 Music 1 1 1 2 2 7
135 Tent, Canopy, Umbrella, or Cane 0 2 1 1 3 7
136 Batteries: Thermoelectric and Photoelectric 0 0 1 5 1 7
169 Fire Extinguishers 0 1 3 3 0 7
182 Fire Escape, Ladder, or Scaffold 0 1 1 4 1 7
209 Classifying, Separating, and Assorting Solids 0 1 3 1 2 7
296 Land Vehicles: Bodies and Tops 1 2 1 3 0 7
312 Supports: Cabinet Structure 0 1 3 3 0 7
331 Oscillators 2 2 1 0 2 7
335 Electricity: Magnetically Operated Switches, Magnets, and Electromagnets 1 0 0 3 3 7
441 Buoys, Rafts, and Aquatic Devices 3 3 1 0 0 7
601 Surgery: Kinesitherapy 1 2 1 0 3 7
037 Excavating 0 1 0 0 5 6
101 Printing 3 1 1 1 0 6
117 Single-Crystal, Oriented-Crystal, and Epitaxy Growth Processes; Non-Coating Apparatus Therefor 2 1 2 0 1 6
188 Brakes 1 2 2 0 1 6
216 Etching a Substrate: Processes 2 1 2 1 0 6
261 Gas and Liquid Contact Apparatus 0 2 1 0 3 6
283 Printed Matter 1 1 0 3 1 6
292 Closure Fasteners 1 0 2 1 2 6
360 Dynamic Magnetic Information Storage or Retrieval 1 2 1 2 0 6
384 Bearings 0 1 5 0 0 6
404 Road Structure, Process, or Apparatus 1 1 1 1 2 6
409 Gear Cutting, Milling, or Planing 0 2 0 2 2 6
415 Rotary Kinetic Fluid Motors or Pumps 1 1 1 2 1 6
417 Pumps 1 1 1 2 1 6
452 Butchering 0 5 0 0 1 6
504 Plant Protecting and Regulating Compositions 1 2 0 1 2 6
510 Cleaning Compositions for Solid Surfaces, Auxiliary Compositions Therefor, or Processes of Preparing the Compositions 1 1 2 1 1 6
014 Bridges 2 0 0 0 3 5
086 Ammunition and Explosive-Charge Making 1 0 0 1 3 5
095 Gas Separation: Processes 1 3 0 0 1 5
099 Foods and Beverages: Apparatus 1 2 1 1 0 5
108 Horizontally Supported Planar Surfaces 1 1 2 0 1 5
131 Tobacco 0 2 1 2 0 5
148 Metal Treatment 2 0 0 2 1 5
177 Weighing Scales 2 1 1 0 1 5
246 Railway Switches and Signals 1 3 0 0 1 5
285 Pipe Joints or Couplings 1 2 1 0 1 5
323 Electricity: Power Supply or Regulation Systems 0 3 0 0 2 5
376 Induced Nuclear Reactions: Processes, Systems, and Elements 2 2 1 0 0 5
414 Material or Article Handling 2 0 0 3 0 5
431 Combustion 1 1 2 1 0 5
454 Ventilation 0 2 1 0 2 5
494 Imperforate Bowl: Centrifugal Separators 0 2 0 3 0 5
047 Plant Husbandry 1 1 0 0 2 4
055 Gas Separation 0 1 0 0 3 4
071 Chemistry: Fertilizers 0 1 1 0 2 4
104 Railways 3 0 0 1 0 4
126 Stoves and Furnaces 0 1 1 1 1 4
215 Bottles and Jars 0 3 1 0 0 4
227 Elongated-Member-Driving Apparatus 3 1 0 0 0 4
228 Metal Fusion Bonding 0 0 1 0 3 4
279 Chucks or Sockets 0 0 0 1 3 4
326 Electronic Digital Logic Circuitry 1 1 0 0 2 4
366 Agitating (e.g., of articles and materials) 3 0 0 0 1 4
392 Electric Resistance Heating Devices 1 0 1 1 1 4
401 Coating Implements with Material Supply 0 0 0 0 4 4
463 Amusement Devices: Games 0 0 1 0 3 4
505 Superconductor Technology: Apparatus, Material, Process 1 1 0 2 0 4
710 Input/Output (Electrical Computers and Digital Processing Systems) 0 1 1 1 1 4
712 Processing Architectures and Instruction Processing, e.g., Processors (Electrical Computers and Digital Processing Systems) 1 0 0 3 0 4
072 Metal Deforming 0 1 2 0 0 3
125 Stone Working 0 1 0 1 1 3
193 Conveyors, Chutes, Skids, Guides, and Ways 0 0 2 0 1 3
237 Heating Systems 0 3 0 0 0 3
251 Valves and Valve Actuation 0 0 2 1 0 3
256 Fences 0 1 0 2 0 3
271 Sheet Feeding or Delivering 2 0 0 0 1 3
281 Books, Strips, and Leaves 0 2 1 0 0 3
358 Facsimile and Static Presentation Processing 0 1 1 1 0 3
368 Horology: Time Measuring Systems or Devices 1 0 0 1 1 3
383 Flexible Bags 0 0 1 1 1 3
386 Television Signal Processing for Dynamic Recording or Reproducing 1 0 0 2 0 3
410 Freight Accommodation On Freight Carrier 0 0 1 0 2 3
419 Powder Metallurgy Processes 1 1 1 0 0 3
450 Foundation Garments 1 0 0 0 2 3
472 Amusement Devices 0 1 1 1 0 3
475 Planetary Gear Transmission Systems or Components 0 1 1 1 0 3
516 Colloid Systems and Wetting Agents, Subcombinations Thereof, Processes of Making, Stabilizing, Breaking, or Inhibiting 1 1 1 0 0 3
708 Arithmetic Processing and Calculating (Electrical Computers) 0 2 0 0 1 3
711 Memory (Electrical Computers and Digital Processing Systems) 2 0 1 0 0 3
716 DP: Design and Analysis of Circuit or Semiconductor Mask (Data Processing) 0 0 2 0 1 3
038 Textiles: Ironing or Smoothing 2 0 0 0 0 2
049 Movable or Removable Closures 1 0 1 0 0 2
076 Metal Tools and Implements, Making 0 1 1 0 0 2
082 Turning (e.g., for metal working) 1 0 0 1 0 2
110 Furnaces 0 0 0 0 2 2
138 Pipes and Tubular Conduits 0 1 0 1 0 2
140 Wireworking 0 0 0 0 2 2
172 Earth Working 0 0 0 0 2 2
175 Boring or Penetrating the Earth 0 0 2 0 0 2
178 Telegraphy 1 1 0 0 0 2
187 Elevator, Industrial Lift Truck, or Stationary Lift for Vehicle 0 1 1 0 0 2
192 Clutches and Power-Stop Control 0 1 1 0 0 2
194 Check-Actuated Control Mechanisms 1 0 0 1 0 2
213 Railway Draft Appliances 0 0 0 0 2 2
232 Deposit and Collection Receptacles 0 1 0 1 0 2
236 Automatic Temperature and Humidity Regulation 0 1 0 0 1 2
238 Railways: Surface Track 1 0 1 0 0 2
254 Implements or Apparatus for Applying Pushing or Pulling Force 0 0 1 0 1 2
269 Work Holders 0 0 1 1 0 2
322 Electricity: Single Generator Systems 0 0 0 1 1 2
347 Incremental Printing of Symbolic Information 0 0 0 1 1 2
369 Dynamic Information Storage or Retrieval 0 1 0 0 1 2
396 Photography 0 2 0 0 0 2
399 Electrophotography 0 1 0 1 0 2
406 Conveyors: Fluid Current 1 0 1 0 0 2
420 Alloys or Metallic Compositions 0 0 1 0 1 2
432 Heating 1 0 0 0 1 2
492 Roll or Roller 1 1 0 0 0 2
508 Solid Anti-Friction Devices, Materials Therefor, Lubricant or Separate Compositions for Moving Solid Surfaces, and Miscellaneous Mineral Oil Compositions 0 0 0 1 1 2
518 Chemistry: Fischer-Tropsch Processes; or Purification or Recovery of Products Thereof 0 0 0 2 0 2
717 DP: Software Development, Installation, and Management (Data Processing) 0 0 0 2 0 2
007 Compound Hand Tools 0 0 1 0 0 1
008 Bleaching and Dyeing; Fluid Treatment and Chemical Modification of Textiles and Fibers 0 0 0 1 0 1
028 Textiles: Manufacturing 0 0 0 1 0 1
054 Harness (for animals) 0 0 1 0 0 1
063 Jewelry 0 0 1 0 0 1
091 Motors: Expansible Chamber Type 0 1 0 0 0 1
100 Presses 1 0 0 0 0 1
105 Railway Rolling Stock 0 1 0 0 0 1
111 Planting 0 0 1 0 0 1
112 Sewing 0 0 0 0 1 1
116 Signals and Indicators 0 0 0 1 0 1
152 Resilient Tires and Wheels 0 0 0 0 1 1
164 Metal Founding 1 0 0 0 0 1
184 Lubrication 1 0 0 0 0 1
186 Merchandising 0 0 1 0 0 1
190 Trunks and Hand-Carried Luggage 1 0 0 0 0 1
202 Distillation: Apparatus 1 0 0 0 0 1
212 Traversing Hoists 0 0 0 1 0 1
223 Apparel Apparatus 0 1 0 0 0 1
226 Advancing Material of Indeterminate Length 0 1 0 0 0 1
249 Static Molds 1 0 0 0 0 1
266 Metallurgical Apparatus 0 0 0 1 0 1
290 Prime-Mover Dynamo Plants 1 0 0 0 0 1
293 Vehicle Fenders 0 0 0 0 1 1
299 Mining or In Situ Disintegration of Hard Material 0 0 1 0 0 1
301 Land Vehicles: Wheels and Axles 0 0 0 1 0 1
329 Demodulators 0 0 0 0 1 1
336 Inductor Devices 1 0 0 0 0 1
337 Electricity: Electrothermally or Thermally Actuated Switches 0 1 0 0 0 1
349 Liquid Crystal Cells, Elements and Systems 0 1 0 0 0 1
373 Industrial Electric Heating Furnaces 0 0 1 0 0 1
377 Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems 0 0 1 0 0 1
400 Typewriting Machines 1 0 0 0 0 1
402 Binder Device Releasably Engaging Aperture or Notch of Sheet 0 0 1 0 0 1
411 Expanded, Threaded, Driven, Headed, Tool-Deformed, or Locked-Threaded Fastener 0 0 1 0 0 1
416 Fluid Reaction Surfaces (i.e., Impellers) 0 0 0 0 1 1
418 Rotary Expansible Chamber Devices 0 0 0 0 1 1
442 Fabric (Woven, Knitted, or Nonwoven Textile or Cloth, Etc.) 1 0 0 0 0 1
445 Electric Lamp or Space Discharge Component or Device Manufacturing 0 0 0 1 0 1
449 Bee Culture (propagating, raising, caring for bees) 0 1 0 0 0 1
464 Rotary Shafts, Gudgeons, Housings, and Flexible Couplings for Rotary Shafts 0 0 0 0 1 1
503 Record Receiver Having Plural Interactive Leaves or a Colorless Color Former, Method of Use, or Developer Therefor 0 0 0 0 1 1
ALL ALL CLASSES 1171 1443 1510 1355 1482 6961



TAF Contacts

Questions regarding these reports should be directed to:

U.S. Patent and Trademark Office
Information Products Division - TAF Branch
PK3- Suite 441
Washington, DC 20231

tel: (703) 306-2600
FAX: (703) 306-2737
email: oeip@uspto.gov

address of TAF Internet pages : http://www.uspto.gov/web/offices/ac/ido/oeip/taf/tafp.html
ftp download of TAF reports from : ftp.uspto.gov/pub/taf/

[Top] [Regional Listing] [TAF Home Page] [USPTO Home Page]

Last Modified: April 9, 2002