CPC to IPC Concordance for Subclass F 21S

Version: 2026.08

CPC Group	IPC Group
F 21S 2/00	F 21 S 2/00
F 21S 2/005	F 21 S 2/00
F 21S 4/00	F 21 S 4/00
F 21S 4/10	F 21 S 4/10
F 21S 4/15	F 21 S 4/15
F 21S 4/20	F 21 S 4/20
F 21S 4/22	F 21 S 4/22
F 21S 4/24	F 21 S 4/24
F 21S 4/26	F 21 S 4/26
F 21S 4/28	F 21 S 4/28
F 21S 6/00	F 21 S 6/00
F 21S 6/001	F 21 S 6/00
F 21S 6/002	F 21 S 6/00
F 21S 6/003	F 21 S 6/00
F 21S 6/004	F 21 S 6/00
F 21S 6/005	F 21 S 6/00
F 21S 6/006	F 21 S 6/00
F 21S 6/007	F 21 S 6/00
F 21S 6/008	F 21 S 6/00
F 21S 8/00	F 21 S 8/00
F 21S 8/003	F 21 S 8/00
F 21S 8/006	F 21 S 8/00
F 21S 8/02	F 21 S 8/02
F 21S 8/022	F 21 S 8/02
F 21S 8/024	F 21 S 8/02
F 21S 8/026	F 21 S 8/02
F 21S 8/028	F 21 S 8/02
F 21S 8/03	F 21 S 8/00
F 21S 8/031	F 21 S 8/00
F 21S 8/032	F 21 S 8/00
F 21S 8/033	F 21 S 8/00
F 21S 8/035	F 21 S 8/00
F 21S 8/036	F 21 S 8/00
F 21S 8/037	F 21 S 8/00
F 21S 8/038	F 21 S 8/00
F 21S 8/04	F 21 S 8/04
F 21S 8/043	F 21 S 8/04
F 21S 8/046	F 21 S 8/04
F 21S 8/06	F 21 S 8/06
F 21S 8/061	F 21 S 8/06
F 21S 8/063	F 21 S 8/06
F 21S 8/065	F 21 S 8/06
F 21S 8/066	F 21 S 8/06
F 21S 8/068	F 21 S 8/06
F 21S 8/08	F 21 S 8/08
F 21S 8/081	F 21 S 8/08
F 21S 8/083	F 21 S 8/08
F 21S 8/085	F 21 S 8/08
F 21S 8/086	F 21 S 8/08
F 21S 8/088	F 21 S 8/08
F 21S 9/00	F 21 S 9/00
F 21S 9/02	F 21 S 9/02
F 21S 9/022	F 21 S 9/02
F 21S 9/024	F 21 S 9/02
F 21S 9/026	F 21 S 9/02
F 21S 9/028	F 21 S 9/02
F 21S 9/03	F 21 S 9/03
F 21S 9/032	F 21 S 9/03
F 21S 9/035	F 21 S 9/03
F 21S 9/037	F 21 S 9/03
F 21S 9/04	F 21 S 9/04
F 21S 9/043	F 21 S 9/04
F 21S 9/046	F 21 S 9/04
F 21S 10/00	F 21 S 10/00
F 21S 10/002	F 21 S 10/00
F 21S 10/005	F 21 S 10/00
F 21S 10/007	F 21 S 10/00
F 21S 10/02	F 21 S 10/02
F 21S 10/023	F 21 S 10/02
F 21S 10/026	F 21 S 10/02
F 21S 10/04	F 21 S 10/04
F 21S 10/043	F 21 S 10/04
F 21S 10/046	F 21 S 10/04
F 21S 10/06	F 21 S 10/06
F 21S 10/063	F 21 S 10/06
F 21S 10/066	F 21 S 10/06
F 21S 11/00	F 21 S 11/00
F 21S 11/002	F 21 S 11/00
F 21S 11/005	F 21 S 11/00
F 21S 11/007	F 21 S 11/00
F 21S 13/00	F 21 S 13/00
F 21S 13/02	F 21 S 13/02
F 21S 13/04	F 21 S 13/04
F 21S 13/06	F 21 S 13/06
F 21S 13/08	F 21 S 13/08
F 21S 13/10	F 21 S 13/10
F 21S 13/12	F 21 S 13/12
F 21S 13/14	F 21 S 13/14
F 21S 15/00	F 21 S 15/00
F 21S 19/00	F 21 S 19/00
F 21S 19/005	F 21 S 19/00
F 21S 41/00	F 21 S 41/00
F 21S 41/10	F 21 S 41/10
F 21S 41/12	F 21 S 41/12
F 21S 41/125	F 21 S 41/125
F 21S 41/13	F 21 S 41/13
F 21S 41/135	F 21 S 41/135
F 21S 41/14	F 21 S 41/14
F 21S 41/141	F 21 S 41/141
F 21S 41/143	F 21 S 41/143
F 21S 41/145	F 21 S 41/145
F 21S 41/147	F 21 S 41/147
F 21S 41/148	F 21 S 41/148
F 21S 41/151	F 21 S 41/151
F 21S 41/153	F 21 S 41/153
F 21S 41/155	F 21 S 41/155
F 21S 41/16	F 21 S 41/16
F 21S 41/162	F 21 S 41/162
F 21S 41/164	F 21 S 41/164
F 21S 41/166	F 21 S 41/166
F 21S 41/168	F 21 S 41/168
F 21S 41/17	F 21 S 41/17
F 21S 41/172	F 21 S 41/172
F 21S 41/173	F 21 S 41/173
F 21S 41/176	F 21 S 41/176
F 21S 41/18	F 21 S 41/14
F 21S 41/19	F 21 S 41/19
F 21S 41/192	F 21 S 41/19
F 21S 41/194	F 21 S 41/19
F 21S 41/196	F 21 S 41/19
F 21S 41/198	F 21 S 41/19
F 21S 41/20	F 21 S 41/20
F 21S 41/24	F 21 S 41/24
F 21S 41/25	F 21 S 41/25
F 21S 41/255	F 21 S 41/255
F 21S 41/26	F 21 S 41/26
F 21S 41/265	F 21 S 41/265
F 21S 41/27	F 21 S 41/27
F 21S 41/275	F 21 S 41/275
F 21S 41/28	F 21 S 41/20
F 21S 41/2805	F 21 S 41/20
F 21S 41/285	F 21 S 41/20
F 21S 41/29	F 21 S 41/29
F 21S 41/295	F 21 S 41/29
F 21S 41/30	F 21 S 41/30
F 21S 41/32	F 21 S 41/32
F 21S 41/321	F 21 S 41/32
F 21S 41/322	F 21 S 41/32
F 21S 41/323	F 21 S 41/32
F 21S 41/33	F 21 S 41/33
F 21S 41/331	F 21 S 41/33
F 21S 41/332	F 21 S 41/33
F 21S 41/333	F 21 S 41/33
F 21S 41/334	F 21 S 41/33
F 21S 41/335	F 21 S 41/33
F 21S 41/336	F 21 S 41/33
F 21S 41/337	F 21 S 41/33
F 21S 41/338	F 21 S 41/33
F 21S 41/36	F 21 S 41/36
F 21S 41/365	F 21 S 41/365
F 21S 41/37	F 21 S 41/37
F 21S 41/39	F 21 S 41/39
F 21S 41/40	F 21 S 41/40
F 21S 41/43	F 21 S 41/43
F 21S 41/435	F 21 S 41/43
F 21S 41/47	F 21 S 41/47
F 21S 41/50	F 21 S 41/50
F 21S 41/55	F 21 S 41/55
F 21S 41/60	F 21 S 41/60
F 21S 41/62	F 21 S 41/62
F 21S 41/63	F 21 S 41/63
F 21S 41/635	F 21 S 41/63
F 21S 41/64	F 21 S 41/64
F 21S 41/645	F 21 S 41/64
F 21S 41/65	F 21 S 41/65
F 21S 41/657	F 21 S 41/657
F 21S 41/663	F 21 S 41/663
F 21S 41/67	F 21 S 41/67
F 21S 41/675	F 21 S 41/675
F 21S 41/68	F 21 S 41/68
F 21S 41/683	F 21 S 41/683
F 21S 41/686	F 21 S 41/686
F 21S 41/689	F 21 S 41/689
F 21S 41/692	F 21 S 41/692
F 21S 41/695	F 21 S 41/695
F 21S 41/698	F 21 S 41/698
F 21S 43/00	F 21 S 43/00
F 21S 43/10	F 21 S 43/10
F 21S 43/13	F 21 S 43/13
F 21S 43/14	F 21 S 43/14
F 21S 43/145	F 21 S 43/145
F 21S 43/15	F 21 S 43/15
F 21S 43/16	F 21 S 43/16
F 21S 43/19	F 21 S 43/19
F 21S 43/195	F 21 S 43/19
F 21S 43/20	F 21 S 43/20
F 21S 43/235	F 21 S 43/235
F 21S 43/236	F 21 S 43/236
F 21S 43/237	F 21 S 43/237
F 21S 43/239	F 21 S 43/239
F 21S 43/241	F 21 S 43/241
F 21S 43/242	F 21 S 43/242
F 21S 43/243	F 21 S 43/243
F 21S 43/245	F 21 S 43/245
F 21S 43/246	F 21 S 43/242
F 21S 43/247	F 21 S 43/247
F 21S 43/249	F 21 S 43/249
F 21S 43/2492	F 21 S 43/249
F 21S 43/251	F 21 S 43/251
F 21S 43/252	F 21 S 43/235
F 21S 43/253	F 21 S 43/235
F 21S 43/255	F 21 S 43/20
F 21S 43/26	F 21 S 43/20
F 21S 43/2605	F 21 S 43/20
F 21S 43/2621	F 21 S 43/20
F 21S 43/26211	F 21 S 43/20
F 21S 43/26221	F 21 S 43/20
F 21S 43/26231	F 21 S 43/20
F 21S 43/26241	F 21 S 43/20
F 21S 43/26251	F 21 S 43/20
F 21S 43/26261	F 21 S 43/20
F 21S 43/26271	F 21 S 43/20
F 21S 43/2641	F 21 S 43/20
F 21S 43/26411	F 21 S 43/20
F 21S 43/26421	F 21 S 43/20
F 21S 43/2643	F 21 S 43/20
F 21S 43/265	F 21 S 43/20
F 21S 43/2651	F 21 S 43/20
F 21S 43/27	F 21 S 43/27
F 21S 43/281	F 21 S 43/20
F 21S 43/2811	F 21 S 43/20
F 21S 43/28131	F 21 S 43/20
F 21S 43/28133	F 21 S 43/20
F 21S 43/28135	F 21 S 43/20
F 21S 43/2815	F 21 S 43/20
F 21S 43/2817	F 21 S 43/20
F 21S 43/30	F 21 S 43/30
F 21S 43/31	F 21 S 43/31
F 21S 43/315	F 21 S 43/31
F 21S 43/33	F 21 S 43/33
F 21S 43/331	F 21 S 43/33
F 21S 43/332	F 21 S 43/33
F 21S 43/37	F 21 S 43/37
F 21S 43/40	F 21 S 43/40
F 21S 43/401	F 21 S 43/40
F 21S 43/402	F 21 S 43/40
F 21S 43/50	F 21 S 43/50
F 21S 43/51	F 21 S 43/50
F 21S 43/601	F 21 S 43/00
F 21S 45/00	F 21 S 45/00
F 21S 45/10	F 21 S 45/10
F 21S 45/20	F 21 S 45/20
F 21S 45/30	F 21 S 45/30
F 21S 45/33	F 21 S 45/33
F 21S 45/37	F 21 S 45/37
F 21S 45/40	F 21 S 45/40
F 21S 45/42	F 21 S 45/42
F 21S 45/43	F 21 S 45/43
F 21S 45/435	F 21 S 45/435
F 21S 45/46	F 21 S 45/46
F 21S 45/465	F 21 S 45/465
F 21S 45/47	F 21 S 45/47
F 21S 45/48	F 21 S 45/48
F 21S 45/49	F 21 S 45/49
F 21S 45/50	F 21 S 45/50
F 21S 45/60	F 21 S 45/60
F 21S 45/70	F 21 S 45/70
F 21S 2217/00	-
F 21S 2217/02	-
F 21S 2243/00	-

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CPC to IPC Concordance for Subclass F21S

CPC to IPC Concordance for Subclass F 21S