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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 1998 - 2002 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' )

The following table displays technology classes and counts of associated patents, as distributed by the year of patent grant
Class Class Title 1998 1999 2000 2001 2002 Total
424 Drug, Bio-Affecting and Body Treating Compositions (includes Class 514) 168 212 164 192 188 924
435 Chemistry: Molecular Biology and Microbiology 177 202 164 170 202 915
128 Surgery (includes Class 600) 32 25 41 42 43 183
530 Chemistry: Natural Resins or Derivatives; Peptides or Proteins; Lignins or Reaction Products Thereof 25 42 25 25 27 144
359 Optics: Systems (Including Communication) and Elements 20 18 25 31 41 135
532 Organic Compounds (includes Classes 532-570) 19 28 17 27 31 122
428 Stock Material or Miscellaneous Articles 25 19 17 18 23 102
606 Surgery (instruments) 34 28 16 10 12 100
455 Telecommunications 21 14 21 24 18 98
342 Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation) 16 26 21 17 15 95
370 Multiplex Communications 25 14 13 19 18 89
385 Optical Waveguides 20 15 12 18 22 87
375 Pulse or Digital Communications 12 18 14 14 18 76
340 Communications: Electrical 18 12 11 21 11 73
356 Optics: Measuring and Testing 20 21 16 7 7 71
436 Chemistry: Analytical and Immunological Testing 12 17 5 16 19 69
073 Measuring and Testing 15 14 11 15 12 67
250 Radiant Energy 15 8 14 9 21 67
604 Surgery (Medicators and Receptors) 23 11 9 15 8 66
324 Electricity: Measuring and Testing 7 12 14 14 16 63
520 Synthetic Resins or Natural Rubbers (includes Classes 520-528) 11 21 7 11 11 61
422 Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing 17 12 10 9 9 57
705 DP: Financial, Business Practice, Management, or Cost/Price Determination (Data Processing) 6 15 14 12 10 57
709 Multiple Computer or Process Coordinating (Electrical Computers and Digital Processing Systems) 10 13 12 9 12 56
379 Telephonic Communications 15 10 10 7 11 53
083 Cutting 6 12 12 9 12 51
102 Ammunition and Explosives 9 8 7 15 12 51
707 DP: Database and File Management or Data Structures (Data Processing) 13 15 6 11 5 50
257 Active Solid-State Devices (e.g., Transistors, Solid-State Diodes) 11 11 7 8 11 48
800 Multicellular Living Organisms and Unmodified Parts Thereof and Related Processes 12 20 5 6 3 46
052 Static Structures (e.g., Buildings) 6 9 10 9 11 45
382 Image Analysis 11 13 7 7 7 45
426 Food or Edible Material: Processes, Compositions, and Products 6 10 9 15 5 45
315 Electric Lamp and Discharge Devices: Systems 14 14 4 8 4 44
343 Communications: Radio Wave Antennas 8 11 5 3 14 41
502 Catalyst, Solid Sorbent, or Support Therefor: Product or Process of Making 6 9 9 9 7 40
702 DP: Measuring, Calibrating, or Testing (Data Processing) 7 6 8 8 11 40
002 Apparel 8 8 5 11 6 38
244 Aeronautics 5 6 7 6 13 37
438 Semiconductor Device Manufacturing: Process 6 2 10 11 8 37
713 Support (Electrical Computers and Digital Processing Systems) 4 8 10 9 6 37
114 Ships 6 4 8 9 9 36
210 Liquid Purification or Separation 12 8 2 8 5 35
030 Cutlery 8 5 5 10 6 34
206 Special Receptacle or Package 5 7 14 2 6 34
351 Optics: Eye Examining, Vision Testing and Correcting 9 9 8 6 2 34
482 Exercise Devices 4 7 11 8 4 34
156 Adhesive Bonding and Miscellaneous Chemical Manufacture 8 10 7 6 2 33
362 Illumination 5 7 9 7 5 33
252 Compositions 9 10 5 5 3 32
248 Supports (e.g., for holding articles, etc.) 7 2 6 4 12 31
607 Surgery: Light, Thermal, and Electrical Application 2 4 9 6 10 31
106 Compositions: Coating or Plastic 12 4 3 5 6 30
345 Computer Graphics Processing, Operator Interface Processing, and Selective Visual Display Systems 6 5 3 9 6 29
427 Coating Processes 7 5 4 7 6 29
704 DP: Speech Signal Processing, Linguistics, Language Translation, and Audio Compression/Decompression (Data Processing) 5 9 2 5 8 29
714 Error Detection/Correction and Fault Detection/Recovery 2 4 6 12 5 29
239 Fluid Sprinkling, Spraying, and Diffusing 4 6 7 6 5 28
313 Electric Lamp and Discharge Devices 9 6 7 4 2 28
222 Dispensing (apparatus and process) 2 5 6 7 7 27
320 Electricity: Battery or Capacitor Charging or Discharging 5 6 6 6 4 27
700 DP: Generic Control Systems or Specific Applications (Data Processing) 5 5 6 6 5 27
029 Metal Working 9 4 3 8 2 26
089 Ordnance 4 9 2 5 6 26
280 Land Vehicles 4 9 5 4 4 26
056 Harvesters 4 2 6 6 7 25
062 Refrigeration 5 3 5 7 5 25
137 Fluid Handling 5 6 3 6 5 25
273 Amusement Devices: Games 3 5 5 7 5 25
623 Prosthesis (i.e., Artificial Body Members), Parts Thereof, or Aids and Accessories Therefor 5 3 5 6 6 25
429 Chemistry: Electrical Current Producing Apparatus, Product, and Process 8 3 3 5 5 24
701 DP: Vehicles, Navigation, and Relative Location (Data Processing) 3 3 7 5 6 24
119 Animal Husbandry 5 10 1 6 1 23
310 Electrical Generator or Motor Structure 5 2 5 6 5 23
380 Cryptography 3 1 5 8 6 23
264 Plastic and Nonmetallic Article Shaping or Treating: Processes 7 3 6 3 3 22
005 Beds 2 5 5 5 4 21
015 Brushing, Scrubbing, and General Cleaning 4 3 8 2 4 21
333 Wave Transmission Lines and Networks 3 7 4 2 5 21
408 Cutting by Use of Rotating Axially Moving Tool 2 1 5 6 7 21
706 DP: Artificial Intelligence (Data Processing) 9 4 3 1 4 21
198 Conveyors: Power-Driven 2 4 4 3 7 20
434 Education and Demonstration 2 4 4 7 3 20
473 Games Using Tangible Projectile 7 3 4 1 5 20
024 Buckles, Buttons, Clasps, Etc. 0 3 4 8 4 19
065 Glass Manufacturing 3 8 4 3 1 19
132 Toilet 5 6 4 3 1 19
149 Explosive and Thermic Compositions or Charges 1 5 3 5 5 19
219 Electric Heating 7 3 3 2 4 19
220 Receptacles 2 2 5 7 3 19
361 Electricity: Electrical Systems and Devices 2 5 3 4 5 19
372 Coherent Light Generators 5 1 5 1 6 18
144 Woodworking 2 7 2 3 3 17
341 Coded Data Generation or Conversion 1 0 6 2 8 17
451 Abrading 1 4 5 3 4 17
588 Hazardous or Toxic Waste Destruction or Containment 3 5 4 4 1 17
725 Interactive Video Distribution Systems 6 3 3 3 2 17
060 Power Plants 0 1 1 6 8 16
123 Internal-Combustion Engines 0 7 2 5 2 16
235 Registers (e.g., cash registers, calculators, devices for counting movements of devices, etc.) 1 4 5 3 3 16
297 Chairs and Seats 4 2 5 4 1 16
348 Television 8 3 1 3 1 16
378 X-Ray or Gamma Ray Systems or Devices 2 3 2 6 3 16
381 Electrical Audio Signal Processing Systems and Devices 8 2 1 1 4 16
423 Chemistry of Inorganic Compounds 3 6 3 3 1 16
433 Dentistry 2 3 2 6 3 16
081 Tools 3 3 5 3 1 15
229 Envelopes, Wrappers, and Paperboard Boxes 1 3 5 4 2 15
430 Radiation Imagery Chemistry: Process, Composition, or Product Thereof 2 3 5 3 2 15
033 Geometrical Instruments 6 2 1 1 4 14
042 Firearms 3 3 1 3 4 14
134 Cleaning and Liquid Contact with Solids 2 2 7 2 1 14
141 Fluent Material Handling, with Receiver or Receiver Coacting Means 2 7 3 2 0 14
165 Heat Exchange 5 2 2 1 4 14
173 Tool Driving or Impacting 3 0 1 6 4 14
200 Electricity: Circuit Makers and Breakers 2 2 5 2 3 14
224 Package and Article Carriers 3 4 3 3 1 14
405 Hydraulic and Earth Engineering 6 0 4 1 3 14
602 Surgery: Splint, Brace, or Bandage 1 3 6 4 0 14
004 Baths, Closets, Sinks, and Spittoons 4 5 0 1 3 13
043 Fishing, Trapping, and Vermin Destroying 3 2 2 3 3 13
053 Package Making 0 2 2 7 2 13
118 Coating Apparatus 2 1 3 3 4 13
174 Electricity: Conductors and Insulators 1 5 5 2 0 13
208 Mineral Oils: Processes and Products 0 2 7 1 3 13
277 Seal for a Joint or Juncture 7 1 2 1 2 13
446 Amusement Devices: Toys 6 0 0 1 6 13
070 Locks 1 4 2 2 3 12
180 Motor Vehicles 0 4 3 4 1 12
205 Electrolysis: Processes, Compositions Used Therein, and Methods of Preparing the Compositions 3 0 2 5 2 12
327 Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems 5 1 4 0 2 12
363 Electric Power Conversion Systems 4 2 5 0 1 12
374 Thermal Measuring and Testing 4 1 3 2 2 12
403 Joints and Connections 4 2 2 2 2 12
425 Plastic Article or Earthenware Shaping or Treating: Apparatus 6 1 0 2 3 12
439 Electrical Connectors 1 3 0 4 4 12
493 Manufacturing Container or Tube From Paper; or Other Manufacturing From a Sheet or Web 3 1 6 1 1 12
162 Paper Making and Fiber Liberation 3 0 4 2 2 11
181 Acoustics 2 1 4 1 3 11
204 Chemistry: Electrical and Wave Energy 2 2 4 2 1 11
211 Supports: Racks 1 0 1 7 2 11
440 Marine Propulsion 0 3 2 2 4 11
075 Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures 3 2 2 1 2 10
135 Tent, Canopy, Umbrella, or Cane 2 1 1 3 3 10
209 Classifying, Separating, and Assorting Solids 1 3 1 2 3 10
221 Article Dispensing 2 3 1 4 0 10
365 Static Information Storage and Retrieval 1 0 3 5 1 10
463 Amusement Devices: Games 0 1 0 3 6 10
016 Miscellaneous Hardware 2 2 1 3 1 9
034 Drying and Gas or Vapor Contact with Solids 1 3 2 2 1 9
074 Machine Element or Mechanism 0 4 3 0 2 9
096 Gas Separation: Apparatus 5 0 0 2 2 9
182 Fire Escape, Ladder, or Scaffold 1 1 4 1 2 9
242 Winding, Tensioning, or Guiding 1 4 1 2 1 9
294 Handling: Hand and Hoist-Line Implements 4 1 1 1 2 9
303 Fluid-Pressure and Analogous Brake Systems 0 4 2 2 1 9
307 Electrical Transmission or Interconnection Systems 3 2 3 1 0 9
312 Supports: Cabinet Structure 1 3 3 0 2 9
330 Amplifiers 1 3 2 2 1 9
367 Communications, Electrical: Acoustic Wave Systems and Devices 1 1 1 4 2 9
136 Batteries: Thermoelectric and Photoelectric 0 1 5 1 1 8
160 Flexible or Portable Closure, Partition, or Panel 1 4 1 2 0 8
241 Solid Material Comminution or Disintegration 3 1 0 3 1 8
318 Electricity: Motive Power Systems 3 1 2 1 1 8
404 Road Structure, Process, or Apparatus 1 1 1 2 3 8
409 Gear Cutting, Milling, or Planing 2 0 2 2 2 8
501 Compositions: Ceramic 2 2 4 0 0 8
601 Surgery: Kinesitherapy 2 1 0 3 2 8
703 DP: Structural Design, Modeling, Simulation, and Emulation (Data Processing) 1 3 0 2 2 8
040 Card, Picture, or Sign Exhibiting 0 1 3 2 1 7
084 Music 1 1 2 2 1 7
124 Mechanical Guns and Projectors 0 2 3 2 0 7
169 Fire Extinguishers 1 3 3 0 0 7
261 Gas and Liquid Contact Apparatus 2 1 0 3 1 7
296 Land Vehicles: Bodies and Tops 2 1 3 0 1 7
335 Electricity: Magnetically Operated Switches, Magnets, and Electromagnets 0 0 3 3 1 7
415 Rotary Kinetic Fluid Motors or Pumps 1 1 2 1 2 7
715 DP: Presentation Processing of Document (Data Processing) 1 1 2 3 0 7
037 Excavating 1 0 0 5 0 6
044 Fuel and Related Compositions 1 1 3 1 0 6
055 Gas Separation 0 0 0 3 3 6
095 Gas Separation: Processes 3 0 0 1 2 6
117 Single-Crystal, Oriented-Crystal, and Epitaxy Growth Processes; Non-Coating Apparatus Therefor 1 2 0 1 2 6
126 Stoves and Furnaces 1 1 1 1 2 6
358 Facsimile and Static Presentation Processing 1 1 1 0 3 6
360 Dynamic Magnetic Information Storage or Retrieval 2 1 2 0 1 6
383 Flexible Bags 0 1 1 1 3 6
384 Bearings 1 5 0 0 0 6
401 Coating Implements with Material Supply 0 0 0 4 2 6
417 Pumps 1 1 2 1 1 6
441 Buoys, Rafts, and Aquatic Devices 3 1 0 0 2 6
452 Butchering 5 0 0 1 0 6
454 Ventilation 2 1 0 2 1 6
494 Imperforate Bowl: Centrifugal Separators 2 0 3 0 1 6
036 Boots, Shoes, and Leggings 3 1 0 1 0 5
099 Foods and Beverages: Apparatus 2 1 1 0 1 5
108 Horizontally Supported Planar Surfaces 1 2 0 1 1 5
131 Tobacco 2 1 2 0 0 5
188 Brakes 2 2 0 1 0 5
228 Metal Fusion Bonding 0 1 0 3 1 5
246 Railway Switches and Signals 3 0 0 1 1 5
279 Chucks or Sockets 0 0 1 3 1 5
283 Printed Matter 1 0 3 1 0 5
292 Closure Fasteners 0 2 1 2 0 5
323 Electricity: Power Supply or Regulation Systems 3 0 0 2 0 5
331 Oscillators 2 1 0 2 0 5
368 Horology: Time Measuring Systems or Devices 0 0 1 1 3 5
431 Combustion 1 2 1 0 1 5
504 Plant Protecting and Regulating Compositions 2 0 1 2 0 5
510 Cleaning Compositions for Solid Surfaces, Auxiliary Compositions Therefor, or Processes of Preparing the Compositions 1 2 1 1 0 5
712 Processing Architectures and Instruction Processing, e.g., Processors (Electrical Computers and Digital Processing Systems) 0 0 3 0 2 5
014 Bridges 0 0 0 3 1 4
047 Plant Husbandry 1 0 0 2 1 4
049 Movable or Removable Closures 0 1 0 0 3 4
071 Chemistry: Fertilizers 1 1 0 2 0 4
072 Metal Deforming 1 2 0 0 1 4
086 Ammunition and Explosive-Charge Making 0 0 1 3 0 4
101 Printing 1 1 1 0 1 4
125 Stone Working 1 0 1 1 1 4
148 Metal Treatment 0 0 2 1 1 4
177 Weighing Scales 1 1 0 1 1 4
215 Bottles and Jars 3 1 0 0 0 4
216 Etching a Substrate: Processes 1 2 1 0 0 4
269 Work Holders 0 1 1 0 2 4
281 Books, Strips, and Leaves 2 1 0 0 1 4
285 Pipe Joints or Couplings 2 1 0 1 0 4
322 Electricity: Single Generator Systems 0 0 1 1 2 4
326 Electronic Digital Logic Circuitry 1 0 0 2 1 4
369 Dynamic Information Storage or Retrieval 1 0 0 1 2 4
376 Induced Nuclear Reactions: Processes, Systems, and Elements 2 1 0 0 1 4
392 Electric Resistance Heating Devices 0 1 1 1 1 4
414 Material or Article Handling 0 0 3 0 1 4
472 Amusement Devices 1 1 1 0 1 4
505 Superconductor Technology: Apparatus, Material, Process 1 0 2 0 1 4
708 Arithmetic Processing and Calculating (Electrical Computers) 2 0 0 1 1 4
710 Input/Output (Electrical Computers and Digital Processing Systems) 1 1 1 1 0 4
063 Jewelry 0 1 0 0 2 3
110 Furnaces 0 0 0 2 1 3
172 Earth Working 0 0 0 2 1 3
193 Conveyors, Chutes, Skids, Guides, and Ways 0 2 0 1 0 3
237 Heating Systems 3 0 0 0 0 3
251 Valves and Valve Actuation 0 2 1 0 0 3
254 Implements or Apparatus for Applying Pushing or Pulling Force 0 1 0 1 1 3
256 Fences 1 0 2 0 0 3
347 Incremental Printing of Symbolic Information 0 0 1 1 1 3
396 Photography 2 0 0 0 1 3
410 Freight Accommodation On Freight Carrier 0 1 0 2 0 3
450 Foundation Garments 0 0 0 2 1 3
475 Planetary Gear Transmission Systems or Components 1 1 1 0 0 3
516 Colloid Systems and Wetting Agents, Subcombinations Thereof, Processes of Making, Stabilizing, Breaking, or Inhibiting 1 1 0 0 1 3
711 Memory (Electrical Computers and Digital Processing Systems) 0 1 0 0 2 3
716 DP: Design and Analysis of Circuit or Semiconductor Mask (Data Processing) 0 2 0 1 0 3
008 Bleaching and Dyeing; Fluid Treatment and Chemical Modification of Textiles and Fibers 0 0 1 0 1 2
076 Metal Tools and Implements, Making 1 1 0 0 0 2
104 Railways 0 0 1 0 1 2
138 Pipes and Tubular Conduits 1 0 1 0 0 2
140 Wireworking 0 0 0 2 0 2
152 Resilient Tires and Wheels 0 0 0 1 1 2
164 Metal Founding 0 0 0 0 2 2
175 Boring or Penetrating the Earth 0 2 0 0 0 2
187 Elevator, Industrial Lift Truck, or Stationary Lift for Vehicle 1 1 0 0 0 2
192 Clutches and Power-Stop Control 1 1 0 0 0 2
212 Traversing Hoists 0 0 1 0 1 2
213 Railway Draft Appliances 0 0 0 2 0 2
223 Apparel Apparatus 1 0 0 0 1 2
226 Advancing Material of Indeterminate Length 1 0 0 0 1 2
232 Deposit and Collection Receptacles 1 0 1 0 0 2
236 Automatic Temperature and Humidity Regulation 1 0 0 1 0 2
266 Metallurgical Apparatus 0 0 1 0 1 2
349 Liquid Crystal Cells, Elements and Systems 1 0 0 0 1 2
386 Television Signal Processing for Dynamic Recording or Reproducing 0 0 2 0 0 2
399 Electrophotography 1 0 1 0 0 2
411 Expanded, Threaded, Driven, Headed, Tool-Deformed, or Locked-Threaded Fastener 0 1 0 0 1 2
419 Powder Metallurgy Processes 1 1 0 0 0 2
420 Alloys or Metallic Compositions 0 1 0 1 0 2
492 Roll or Roller 1 0 0 0 1 2
508 Solid Anti-Friction Devices, Materials Therefor, Lubricant or Separate Compositions for Moving Solid Surfaces, and Miscellaneous Mineral Oil Compositions 0 0 1 1 0 2
518 Chemistry: Fischer-Tropsch Processes; or Purification or Recovery of Products Thereof 0 0 2 0 0 2
717 DP: Software Development, Installation, and Management (Data Processing) 0 0 2 0 0 2
007 Compound Hand Tools 0 1 0 0 0 1
028 Textiles: Manufacturing 0 0 1 0 0 1
051 Abrasive Tool Making Process, Material, or Composition 0 0 0 0 1 1
054 Harness (for animals) 0 1 0 0 0 1
082 Turning (e.g., for metal working) 0 0 1 0 0 1
091 Motors: Expansible Chamber Type 1 0 0 0 0 1
105 Railway Rolling Stock 1 0 0 0 0 1
111 Planting 0 1 0 0 0 1
112 Sewing 0 0 0 1 0 1
116 Signals and Indicators 0 0 1 0 0 1
122 Liquid Heaters and Vaporizers 0 0 0 0 1 1
166 Wells (shafts or deep borings in the earth, e.g., for oil and gas) 0 0 0 0 1 1
178 Telegraphy 1 0 0 0 0 1
186 Merchandising 0 1 0 0 0 1
194 Check-Actuated Control Mechanisms 0 0 1 0 0 1
227 Elongated-Member-Driving Apparatus 1 0 0 0 0 1
238 Railways: Surface Track 0 1 0 0 0 1
271 Sheet Feeding or Delivering 0 0 0 1 0 1
293 Vehicle Fenders 0 0 0 1 0 1
299 Mining or In Situ Disintegration of Hard Material 0 1 0 0 0 1
301 Land Vehicles: Wheels and Axles 0 0 1 0 0 1
329 Demodulators 0 0 0 1 0 1
337 Electricity: Electrothermally or Thermally Actuated Switches 1 0 0 0 0 1
353 Optics: Image Projectors 0 0 0 0 1 1
355 Photocopying 0 0 0 0 1 1
366 Agitating (e.g., of articles and materials) 0 0 0 1 0 1
373 Industrial Electric Heating Furnaces 0 1 0 0 0 1
377 Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems 0 1 0 0 0 1
388 Electricity: Motor Control Systems 0 0 0 0 1 1
402 Binder Device Releasably Engaging Aperture or Notch of Sheet 0 1 0 0 0 1
406 Conveyors: Fluid Current 0 1 0 0 0 1
416 Fluid Reaction Surfaces (i.e., Impellers) 0 0 0 1 0 1
418 Rotary Expansible Chamber Devices 0 0 0 1 0 1
432 Heating 0 0 0 1 0 1
445 Electric Lamp or Space Discharge Component or Device Manufacturing 0 0 1 0 0 1
449 Bee Culture (propagating, raising, caring for bees) 1 0 0 0 0 1
464 Rotary Shafts, Gudgeons, Housings, and Flexible Couplings for Rotary Shafts 0 0 0 1 0 1
476 Friction Gear Transmission Systems or Components 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 1 0 1
ALL ALL CLASSES 1443 1510 1356 1482 1460 7251


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U.S. Patent and Trademark Office
Office of Electronic Information Products - PTMD
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tel: (703) 306-2600
fax: (703) 306-2737
email: oeip@uspto.gov

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