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 1996 - 2000 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 1996 1997 1998 1999 2000 Total
424 Drug, Bio-Affecting and Body Treating Compositions (includes Class 514) 96 156 168 212 164 796
435 Chemistry: Molecular Biology and Microbiology 103 120 177 202 163 765
128 Surgery (includes Class 600) 22 29 32 25 40 148
606 Surgery (instruments) 26 30 34 29 16 135
530 Chemistry: Natural Resins or Derivatives; Peptides or Proteins; Lignins or Reaction Products Thereof 18 20 25 42 26 131
532 Organic Compounds (includes Classes 532-570) 19 26 19 28 17 109
342 Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation) 21 8 16 26 21 92
520 Synthetic Resins or Natural Rubbers (includes Classes 520-528) 33 19 11 21 7 91
428 Stock Material or Miscellaneous Articles 14 15 25 19 17 90
359 Optics: Systems (Including Communication) and Elements 13 13 20 18 25 89
356 Optics: Measuring and Testing 13 11 20 21 16 81
604 Surgery (Medicators and Receptors) 14 23 23 12 9 81
370 Multiplex Communications 13 15 25 14 13 80
250 Radiant Energy 26 11 15 8 14 74
455 Telecommunications 5 9 22 15 23 74
375 Pulse or Digital Communications 16 11 12 18 14 71
340 Communications: Electrical 11 17 17 11 12 68
379 Telephonic Communications 19 14 15 10 9 67
073 Measuring and Testing 12 11 15 14 11 63
385 Optical Waveguides 4 9 20 15 12 60
324 Electricity: Measuring and Testing 17 6 7 12 14 56
436 Chemistry: Analytical and Immunological Testing 8 13 12 17 5 55
422 Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing 8 5 17 12 10 52
210 Liquid Purification or Separation 10 17 12 8 2 49
709 Multiple Computer or Process Coordinating (Electrical Computers and Digital Processing Systems) 7 7 10 13 12 49
102 Ammunition and Explosives 9 14 9 8 7 47
707 DP: Database and File Management, Data Structures, Or Document Processing (Data Processing) 4 5 14 16 8 47
800 Multicellular Living Organisms and Unmodified Parts Thereof and Related Processes 0 8 12 20 5 45
252 Compositions 11 9 9 10 5 44
382 Image Analysis 7 4 11 13 7 42
052 Static Structures (e.g., Buildings) 4 12 6 9 10 41
482 Exercise Devices 14 5 4 7 11 41
705 DP: Financial, Business Practice, Management, or Cost/Price Determination (Data Processing) 3 3 6 15 13 40
257 Active Solid-State Devices (e.g., Transistors, Solid-State Diodes) 4 5 11 11 7 38
315 Electric Lamp and Discharge Devices: Systems 5 1 14 14 4 38
156 Adhesive Bonding and Miscellaneous Chemical Manufacture 4 7 8 10 7 36
426 Food or Edible Material: Processes, Compositions, and Products 5 6 6 10 9 36
206 Special Receptacle or Package 4 5 5 7 14 35
351 Optics: Eye Examining, Vision Testing and Correcting 4 5 9 9 8 35
083 Cutting 1 2 6 12 12 33
473 Games Using Tangible Projectile 8 11 7 3 4 33
002 Apparel 4 7 8 8 5 32
313 Electric Lamp and Discharge Devices 3 7 9 6 7 32
343 Communications: Radio Wave Antennas 5 3 8 11 5 32
704 DP: Speech Signal Processing, Linguistics, Language Translation, and Audio Compression/Decompression (Data Processing) 7 9 5 9 2 32
062 Refrigeration 9 9 5 3 5 31
106 Compositions: Coating or Plastic 7 6 12 4 2 31
427 Coating Processes 5 10 7 5 4 31
502 Catalyst, Solid Sorbent, or Support Therefor: Product or Process of Making 3 4 6 9 9 31
702 DP: Measuring, Calibrating, or Testing (Data Processing) 2 8 7 6 8 31
713 Support (Electrical Computers and Digital Processing Systems) 2 7 4 8 10 31
362 Illumination 6 2 5 7 9 29
015 Brushing, Scrubbing, and General Cleaning 6 6 4 3 8 27
114 Ships 5 4 6 4 8 27
132 Toilet 5 6 5 6 4 26
714 Error Detection/Correction and Fault Detection/Recovery 8 6 2 4 6 26
239 Fluid Sprinkling, Spraying, and Diffusing 4 4 4 6 7 25
280 Land Vehicles 3 4 4 9 5 25
438 Semiconductor Device Manufacturing: Process 4 3 6 2 10 25
725 Interactive Video Distribution Systems 5 8 6 4 2 25
244 Aeronautics 4 2 5 6 7 24
248 Supports (e.g., for holding articles, etc.) 2 7 7 2 6 24
264 Plastic and Nonmetallic Article Shaping or Treating: Processes 3 5 7 3 6 24
429 Chemistry: Electrical Current Producing Apparatus, Product, and Process 5 5 8 3 3 24
706 DP: Artificial Intelligence (Data Processing) 4 4 9 4 3 24
345 Computer Graphics Processing, Operator Interface Processing, and Selective Visual Display Systems 4 4 6 4 5 23
423 Chemistry of Inorganic Compounds 5 6 3 6 3 23
700 DP: Generic Control Systems or Specific Applications (Data Processing) 5 2 5 5 6 23
030 Cutlery 3 1 8 5 5 22
089 Ordnance 1 6 4 9 2 22
119 Animal Husbandry 1 5 5 10 1 22
219 Electric Heating 8 1 7 3 3 22
222 Dispensing (apparatus and process) 2 7 2 5 6 22
310 Electrical Generator or Motor Structure 6 4 5 2 5 22
320 Electricity: Battery or Capacitor Charging or Discharging 2 3 5 6 6 22
501 Compositions: Ceramic 8 6 2 2 4 22
029 Metal Working 1 4 9 4 3 21
381 Electrical Audio Signal Processing Systems and Devices 6 4 8 2 1 21
005 Beds 3 5 2 5 5 20
137 Fluid Handling 3 3 5 6 3 20
607 Surgery: Light, Thermal, and Electrical Application 5 0 2 4 9 20
333 Wave Transmission Lines and Networks 2 3 3 7 4 19
623 Prosthesis (i.e., Artificial Body Members), Parts Thereof, or Aids and Accessories Therefor 1 6 5 1 6 19
273 Amusement Devices: Games 2 3 3 5 5 18
348 Television 1 5 8 3 1 18
361 Electricity: Electrical Systems and Devices 7 1 2 5 3 18
434 Education and Demonstration 5 3 2 4 4 18
493 Manufacturing Container or Tube From Paper; or Other Manufacturing From a Sheet or Web 4 4 3 1 6 18
004 Baths, Closets, Sinks, and Spittoons 4 4 4 5 0 17
065 Glass Manufacturing 1 1 3 8 4 17
198 Conveyors: Power-Driven 3 4 2 4 4 17
363 Electric Power Conversion Systems 3 3 4 2 5 17
367 Communications, Electrical: Acoustic Wave Systems and Devices 7 7 1 1 1 17
446 Amusement Devices: Toys 6 5 6 0 0 17
033 Geometrical Instruments 3 4 6 2 1 16
043 Fishing, Trapping, and Vermin Destroying 7 2 3 2 2 16
056 Harvesters 2 2 4 2 6 16
134 Cleaning and Liquid Contact with Solids 3 2 2 2 7 16
372 Coherent Light Generators 3 2 5 1 5 16
430 Radiation Imagery Chemistry: Process, Composition, or Product Thereof 5 1 2 3 5 16
141 Fluent Material Handling, with Receiver or Receiver Coacting Means 2 1 2 7 3 15
165 Heat Exchange 4 2 5 2 2 15
204 Chemistry: Electrical and Wave Energy 3 4 2 2 4 15
224 Package and Article Carriers 2 3 3 4 3 15
277 Seal for a Joint or Juncture 4 1 7 1 2 15
297 Chairs and Seats 0 4 4 2 5 15
588 Hazardous or Toxic Waste Destruction or Containment 0 3 3 5 4 15
123 Internal-Combustion Engines 2 3 0 7 2 14
208 Mineral Oils: Processes and Products 3 2 0 2 7 14
229 Envelopes, Wrappers, and Paperboard Boxes 2 3 1 3 5 14
307 Electrical Transmission or Interconnection Systems 4 2 3 2 3 14
318 Electricity: Motive Power Systems 6 2 3 1 2 14
327 Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems 1 3 5 1 4 14
701 DP: Vehicles, Navigation, and Relative Location (Data Processing) 2 0 3 3 6 14
220 Receptacles 2 2 2 2 5 13
341 Coded Data Generation or Conversion 5 1 1 0 6 13
380 Cryptography 1 3 3 1 5 13
405 Hydraulic and Earth Engineering 2 1 6 0 4 13
081 Tools 1 0 3 3 5 12
160 Flexible or Portable Closure, Partition, or Panel 3 3 1 4 1 12
174 Electricity: Conductors and Insulators 1 0 1 5 5 12
181 Acoustics 1 4 2 1 4 12
294 Handling: Hand and Hoist-Line Implements 4 2 4 1 1 12
403 Joints and Connections 3 1 4 2 2 12
433 Dentistry 1 4 2 3 2 12
451 Abrading 2 0 1 4 5 12
070 Locks 0 4 1 4 2 11
096 Gas Separation: Apparatus 3 4 4 0 0 11
144 Woodworking 0 0 2 7 2 11
162 Paper Making and Fiber Liberation 2 2 3 0 4 11
211 Supports: Racks 2 7 1 0 1 11
425 Plastic Article or Earthenware Shaping or Treating: Apparatus 2 2 6 1 0 11
602 Surgery: Splint, Brace, or Bandage 0 1 1 3 6 11
040 Card, Picture, or Sign Exhibiting 1 5 0 1 3 10
149 Explosive and Thermic Compositions or Charges 1 0 1 5 3 10
200 Electricity: Circuit Makers and Breakers 0 1 2 2 5 10
235 Registers (e.g., cash registers, calculators, devices for counting movements of devices, etc.) 0 0 1 4 5 10
330 Amplifiers 2 2 1 3 2 10
378 X-Ray or Gamma Ray Systems or Devices 2 1 2 3 2 10
439 Electrical Connectors 5 1 1 3 0 10
084 Music 4 1 1 1 2 9
118 Coating Apparatus 1 2 2 1 3 9
169 Fire Extinguishers 2 0 1 3 3 9
374 Thermal Measuring and Testing 1 0 4 1 3 9
408 Cutting by Use of Rotating Axially Moving Tool 0 1 2 1 5 9
440 Marine Propulsion 1 3 0 3 2 9
016 Miscellaneous Hardware 0 3 2 2 1 8
024 Buckles, Buttons, Clasps, Etc. 0 1 0 3 4 8
034 Drying and Gas or Vapor Contact with Solids 0 2 1 3 2 8
060 Power Plants 4 2 0 1 1 8
074 Machine Element or Mechanism 1 0 0 4 3 8
099 Foods and Beverages: Apparatus 3 1 2 1 1 8
101 Printing 2 3 1 1 1 8
180 Motor Vehicles 1 0 0 4 3 8
242 Winding, Tensioning, or Guiding 1 1 1 4 1 8
417 Pumps 3 1 1 1 2 8
441 Buoys, Rafts, and Aquatic Devices 1 3 3 1 0 8
042 Firearms 0 0 3 3 1 7
075 Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures 0 0 3 2 2 7
095 Gas Separation: Processes 3 1 3 0 0 7
124 Mechanical Guns and Projectors 0 2 0 2 3 7
148 Metal Treatment 3 2 0 0 2 7
173 Tool Driving or Impacting 1 2 3 0 1 7
182 Fire Escape, Ladder, or Scaffold 1 0 1 1 4 7
188 Brakes 2 1 2 2 0 7
205 Electrolysis: Processes, Compositions Used Therein, and Methods of Preparing the Compositions 1 1 3 0 2 7
216 Etching a Substrate: Processes 1 2 1 2 1 7
285 Pipe Joints or Couplings 3 1 2 1 0 7
296 Land Vehicles: Bodies and Tops 0 1 2 1 3 7
312 Supports: Cabinet Structure 0 0 1 3 3 7
360 Dynamic Magnetic Information Storage or Retrieval 1 1 2 1 2 7
510 Cleaning Compositions for Solid Surfaces, Auxiliary Compositions Therefor, or Processes of Preparing the Compositions 2 1 1 2 1 7
703 DP: Structural Design, Modeling, Simulation, and Emulation (Data Processing) 1 2 1 3 0 7
036 Boots, Shoes, and Leggings 0 2 3 1 0 6
044 Fuel and Related Compositions 0 1 1 1 3 6
053 Package Making 2 0 0 2 2 6
131 Tobacco 1 0 2 1 2 6
136 Batteries: Thermoelectric and Photoelectric 0 0 0 1 5 6
209 Classifying, Separating, and Assorting Solids 1 0 1 3 1 6
221 Article Dispensing 0 0 2 3 1 6
241 Solid Material Comminution or Disintegration 1 1 3 1 0 6
256 Fences 3 0 1 0 2 6
283 Printed Matter 1 1 1 0 3 6
303 Fluid-Pressure and Analogous Brake Systems 0 0 0 4 2 6
331 Oscillators 1 2 2 1 0 6
366 Agitating (e.g., of articles and materials) 3 3 0 0 0 6
376 Induced Nuclear Reactions: Processes, Systems, and Elements 1 2 2 1 0 6
384 Bearings 0 0 1 5 0 6
392 Electric Resistance Heating Devices 3 1 0 1 1 6
409 Gear Cutting, Milling, or Planing 2 0 2 0 2 6
431 Combustion 1 1 1 2 1 6
452 Butchering 1 0 5 0 0 6
494 Imperforate Bowl: Centrifugal Separators 1 0 2 0 3 6
505 Superconductor Technology: Apparatus, Material, Process 2 1 1 0 2 6
014 Bridges 3 2 0 0 0 5
072 Metal Deforming 2 0 1 2 0 5
108 Horizontally Supported Planar Surfaces 1 1 1 2 0 5
117 Single-Crystal, Oriented-Crystal, and Epitaxy Growth Processes; Non-Coating Apparatus Therefor 0 2 1 2 0 5
126 Stoves and Furnaces 2 0 1 1 1 5
135 Tent, Canopy, Umbrella, or Cane 1 0 2 1 1 5
227 Elongated-Member-Driving Apparatus 1 3 1 0 0 5
246 Railway Switches and Signals 1 1 3 0 0 5
292 Closure Fasteners 1 1 0 2 1 5
358 Facsimile and Static Presentation Processing 2 0 1 1 1 5
368 Horology: Time Measuring Systems or Devices 3 1 0 0 1 5
386 Television Signal Processing for Dynamic Recording or Reproducing 2 1 0 0 2 5
404 Road Structure, Process, or Apparatus 1 1 1 1 1 5
414 Material or Article Handling 0 2 0 0 3 5
415 Rotary Kinetic Fluid Motors or Pumps 0 1 1 1 2 5
475 Planetary Gear Transmission Systems or Components 2 0 1 1 1 5
504 Plant Protecting and Regulating Compositions 1 1 2 0 1 5
601 Surgery: Kinesitherapy 1 1 2 1 0 5
710 Input/Output (Electrical Computers and Digital Processing Systems) 2 0 1 1 1 5
038 Textiles: Ironing or Smoothing 2 2 0 0 0 4
104 Railways 0 3 0 0 1 4
177 Weighing Scales 0 2 1 1 0 4
215 Bottles and Jars 0 0 3 1 0 4
237 Heating Systems 1 0 3 0 0 4
271 Sheet Feeding or Delivering 2 2 0 0 0 4
281 Books, Strips, and Leaves 1 0 2 1 0 4
323 Electricity: Power Supply or Regulation Systems 1 0 3 0 0 4
335 Electricity: Magnetically Operated Switches, Magnets, and Electromagnets 0 1 0 0 3 4
365 Static Information Storage and Retrieval 0 0 1 0 3 4
454 Ventilation 1 0 2 1 0 4
516 Colloid Systems and Wetting Agents, Subcombinations Thereof, Processes of Making, Stabilizing, Breaking, or Inhibiting 1 1 1 1 0 4
708 Arithmetic Processing and Calculating (Electrical Computers) 2 0 2 0 0 4
712 Processing Architectures and Instruction Processing, e.g., Processors (Electrical Computers and Digital Processing Systems) 0 1 0 0 3 4
047 Plant Husbandry 1 1 1 0 0 3
049 Movable or Removable Closures 1 1 0 1 0 3
100 Presses 2 1 0 0 0 3
175 Boring or Penetrating the Earth 1 0 0 2 0 3
192 Clutches and Power-Stop Control 1 0 1 1 0 3
251 Valves and Valve Actuation 0 0 0 2 1 3
261 Gas and Liquid Contact Apparatus 0 0 2 1 0 3
269 Work Holders 1 0 0 1 1 3
326 Electronic Digital Logic Circuitry 1 1 1 0 0 3
406 Conveyors: Fluid Current 1 1 0 1 0 3
419 Powder Metallurgy Processes 0 1 1 1 0 3
472 Amusement Devices 0 0 1 1 1 3
711 Memory (Electrical Computers and Digital Processing Systems) 0 2 0 1 0 3
055 Gas Separation 1 0 1 0 0 2
071 Chemistry: Fertilizers 0 0 1 1 0 2
076 Metal Tools and Implements, Making 0 0 1 1 0 2
082 Turning (e.g., for metal working) 0 1 0 0 1 2
086 Ammunition and Explosive-Charge Making 0 1 0 0 1 2
125 Stone Working 0 0 1 0 1 2
138 Pipes and Tubular Conduits 0 0 1 0 1 2
164 Metal Founding 1 1 0 0 0 2
166 Wells (shafts or deep borings in the earth, e.g., for oil and gas) 2 0 0 0 0 2
178 Telegraphy 0 1 1 0 0 2
184 Lubrication 1 1 0 0 0 2
187 Elevator, Industrial Lift Truck, or Stationary Lift for Vehicle 0 0 1 1 0 2
193 Conveyors, Chutes, Skids, Guides, and Ways 0 0 0 2 0 2
194 Check-Actuated Control Mechanisms 0 1 0 0 1 2
212 Traversing Hoists 1 0 0 0 1 2
228 Metal Fusion Bonding 1 0 0 1 0 2
232 Deposit and Collection Receptacles 0 0 1 0 1 2
238 Railways: Surface Track 0 1 0 1 0 2
249 Static Molds 1 1 0 0 0 2
254 Implements or Apparatus for Applying Pushing or Pulling Force 1 0 0 1 0 2
329 Demodulators 2 0 0 0 0 2
349 Liquid Crystal Cells, Elements and Systems 1 0 1 0 0 2
369 Dynamic Information Storage or Retrieval 1 0 1 0 0 2
377 Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems 1 0 0 1 0 2
383 Flexible Bags 0 0 0 1 1 2
396 Photography 0 0 2 0 0 2
399 Electrophotography 0 0 1 0 1 2
400 Typewriting Machines 1 1 0 0 0 2
402 Binder Device Releasably Engaging Aperture or Notch of Sheet 1 0 0 1 0 2
420 Alloys or Metallic Compositions 1 0 0 1 0 2
450 Foundation Garments 1 1 0 0 0 2
492 Roll or Roller 0 1 1 0 0 2
508 Solid Anti-Friction Devices, Materials Therefor, Lubricant or Separate Compositions for Moving Solid Surfaces, and Miscellaneous Mineral Oil Compositions 1 0 0 0 1 2
518 Chemistry: Fischer-Tropsch Processes; or Purification or Recovery of Products Thereof 0 0 0 0 2 2
716 DP: Design and Analysis of Circuit or Semiconductor Mask (Data Processing) 0 0 0 2 0 2
007 Compound Hand Tools 0 0 0 1 0 1
008 Bleaching and Dyeing; Fluid Treatment and Chemical Modification of Textiles and Fibers 0 0 0 0 1 1
028 Textiles: Manufacturing 0 0 0 0 1 1
037 Excavating 0 0 1 0 0 1
054 Harness (for animals) 0 0 0 1 0 1
063 Jewelry 0 0 0 1 0 1
091 Motors: Expansible Chamber Type 0 0 1 0 0 1
105 Railway Rolling Stock 0 0 1 0 0 1
111 Planting 0 0 0 1 0 1
116 Signals and Indicators 0 0 0 0 1 1
140 Wireworking 1 0 0 0 0 1
152 Resilient Tires and Wheels 1 0 0 0 0 1
186 Merchandising 0 0 0 1 0 1
190 Trunks and Hand-Carried Luggage 0 1 0 0 0 1
202 Distillation: Apparatus 0 1 0 0 0 1
223 Apparel Apparatus 0 0 1 0 0 1
226 Advancing Material of Indeterminate Length 0 0 1 0 0 1
236 Automatic Temperature and Humidity Regulation 0 0 1 0 0 1
266 Metallurgical Apparatus 0 0 0 0 1 1
279 Chucks or Sockets 0 0 0 0 1 1
289 Knots and Knot Tying 1 0 0 0 0 1
290 Prime-Mover Dynamo Plants 0 1 0 0 0 1
299 Mining or In Situ Disintegration of Hard Material 0 0 0 1 0 1
301 Land Vehicles: Wheels and Axles 0 0 0 0 1 1
322 Electricity: Single Generator Systems 0 0 0 0 1 1
332 Modulators 1 0 0 0 0 1
336 Inductor Devices 0 1 0 0 0 1
337 Electricity: Electrothermally or Thermally Actuated Switches 0 0 1 0 0 1
347 Incremental Printing of Symbolic Information 0 0 0 0 1 1
373 Industrial Electric Heating Furnaces 0 0 0 1 0 1
401 Coating Implements with Material Supply 1 0 0 0 0 1
407 Cutters, for Shaping 1 0 0 0 0 1
410 Freight Accommodation On Freight Carrier 0 0 0 1 0 1
411 Expanded, Threaded, Driven, Headed, Tool-Deformed, or Locked-Threaded Fastener 0 0 0 1 0 1
432 Heating 0 1 0 0 0 1
442 Fabric (Woven, Knitted, or Nonwoven Textile or Cloth, Etc.) 0 1 0 0 0 1
445 Electric Lamp or Space Discharge Component or Device Manufacturing 0 0 0 0 1 1
449 Bee Culture (propagating, raising, caring for bees) 0 0 1 0 0 1
463 Amusement Devices: Games 0 0 0 1 0 1
464 Rotary Shafts, Gudgeons, Housings, and Flexible Couplings for Rotary Shafts 1 0 0 0 0 1
476 Friction Gear Transmission Systems or Components 1 0 0 0 0 1
477 Interrelated Power Delivery Controls, Including Engine Control 1 0 0 0 0 1
717 DP: Software Development, Installation, and Management (Data Processing) 0 0 0 0 1 1
ALL ALL CLASSES 1101 1171 1443 1510 1355 6580



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/

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Last Modified: April 30, 2001