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Patents > Filing date: 1917 & National tech categories : USPC 244/903 or None

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None (294) · John P. Tarbox (13) · Brewer & Son (12) · None (11) · Boult, Wade & Tennant (9) · Marks & Clerk (7) · Haseltine, Lake & Co. (7) · Victor J. Evans (7) · Randolph, Jr. (5) · Herbert Haddan & Co. (4) · Mewburn, Ellis & Pryor (4) · Munn & Co. (3) · Joseph F. O'Brien (3) · J. D. Roots & Co. (3) · J. S. Withers & Spooner (3) · A. A. Thornton (3)
National tech categories: (Click arrow to add another value)
IPCs:
None (352) · IPC B64C3/18 (16) · IPC B64C3/00 (13) · IPC B64C39/00 (8) · IPC B64C1/06 (6) · IPC B64C13/12 (5) · IPC B64C1/00 (5) · IPC B64C35/00 (5) · IPC B64C13/00 (5) · IPC B64C27/04 (4) · IPC B64C11/04 (4) · IPC B64C3/38 (4) · IPC B64C1/08 (3) · IPC B64C13/24 (3) · IPC B64C11/20 (3) · IPC B64C11/22 (3)
CPCs:
CPC B64C3/00 (38) · CPC B64C2700/6295 (30) · CPC B64C23/005 (23) · CPC B64C13/00 (23) · CPC B64C3/185 (20) · CPC B64C2700/6235 (20) · CPC B64B1/00 (18) · CPC B64C2001/0063 (17) · CPC B64C17/00 (17) · CPC B64C35/00 (16) · CPC B64C2700/6256 (15) · CPC B64C2700/6233 (14) · CPC B64C39/00 (12) · CPC B64C2001/0081 (11) · CPC B64C25/60 (10) · CPC B64C3/18 (9) · CPC B64C1/065 (9) · CPC B64B1/40 (9) · CPC B64C11/04 (8)
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