Classification Orders Index (COI)
December 2012
The Classification Orders Index contains changes to the U.S. Patent Classification System (USPCS) resulting from classification orders that issued from 1976 through the present. The Classification Orders Index is updated quarterly in March, June, September, and December. Links to classes within the Classification Orders Index are below.
- Classes 2-7
- Classes 8-15
- Classes 16-29
- Classes 30-38
- Classes 40-52
- Classes 53-61
- Classes 62-71
- Classes 72-81
- Classes 82-96
- Classes 98-106
- Classes 108-119
- Classes 122-131
- Classes 132-145
- Classes 148-152
- Classes 156-157
- Classes 159-168
- Classes 172-181
- Classes 182-190
- Classes 192 -197
- Class 198
- Classes 200-204
- Classes 205-208
- Classes 209-210
- Classes 211-226
- Classes 227-240
- Classes 241-242
- Classes 243-246
- Class 248 (Part One)
- Class 248 (Part Two)
- Classes 249-250 (Part One)
- Class 250 (Part Two)
- Classes 251-260
- Classes 261-272
- Classes 273-282
- Classes 283-295
- Classes 296-307
- Classes 308-312
- Classes 313-331
- Classes 332-340 (Part One)
- Classes 340 (Part Two) - 342
- Classes 343-347
- Classes 349-354
- Classes 355-359
- Classes 360-363
- Classes 364-370
- Classes 371-382
- Classes 383-403
- Classes 404-415
- Classes 417-423
- Class 424
- Classes 425-427
- Class 428
- Classes 429-431
- Classes 432-435
- Classes 436-494
- Classes 501-520
- Classes 521-532
- Classes 534-549
- Classes 552-602
- Classes 604-700
- Classes 701-709
- Classes 710-714
- Classes 715-987
- Classes D01-D06
- Classes D07-D11
- Classes D12-D20
- Classes D21-D34
- Classes D35-D99
- Classes PLT