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Class Number Class Name Patents
420 Alloys or metallic compositions 20,524
119 Animal husbandry 21,333
134 Cleaning and liquid contact with solids 58,535
252 Compositions 84,835
501 Compositions: ceramic 38,669
106 Compositions: coating or plastic 79,953
34 Drying and gas or vapor contact with solids 26,730
349 Liquid crystal cells, elements and systems 68,815
184 Lubrication 7,339
72 Metal deforming 43,678
164 Metal founding 28,602
228 Metal fusion bonding 32,775
76 Metal tools and implements, making 3,052
148 Metal treatment 50,530
266 Metallurgical apparatus 13,802
208 Mineral oils: processes and products 42,993
299 Mining or in situ disintegration of hard material 6,780
977 Nanotechnology 18,000
264 Plastic and nonmetallic article shaping or treating: processes 176,993
425 Plastic article or earthenware shaping or treating: apparatus 85,196
419 Powder metallurgy processes 15,990
503 Record receiver having plural interactive leaves or a colorless color former, method of use, or developer therefor 8,713
117 Single-crystal, oriented-crystal, and epitaxy growth processes; non-coating apparatus therefor 24,778
508 Solid anti-friction devices, materials therefor, lubricant or separant compositions for moving solid surfaces, and miscellaneous mineral oil compositions 19,827
75 Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures 25,040
428 Stock material or miscellaneous articles 414,330
526 Synthetic resins or natural rubbers -- part of the class 520 series 100,291
527 Synthetic resins or natural rubbers -- part of the class 520 series 2,003
528 Synthetic resins or natural rubbers -- part of the class 520 series 139,076
525 Synthetic resins or natural rubbers -- part of the class 520 series 161,026
524 Synthetic resins or natural rubbers -- part of the class 520 series 171,673
523 Synthetic resins or natural rubbers -- part of the class 520 series 35,591
521 Synthetic resins or natural rubbers -- part of the class 520 series 41,999
520 Synthetic resins or natural rubbers -- part of the class 520 series 15
522 Synthetic resins or natural rubbers -- part of the class 520 series 35,928
245 Wire fabrics and structure 305
 
 
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