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Patents > Filing date: 1917 & National tech categories : USPC 244/80 or None

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Tech fields:
None (352) · airplane (39) · construction (26) · frame (23) · control (18) · Design (16) · wings (14) · propellers (14) · fuselage (13) · propulsion (11) · stability (11) · LTA (10) · aerial propeller (9) · military (8) · propeller (7) · landing (7) · metal (6) · rudder (6) · aerial propellers (6) · structure (6)
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Patent agent:
None (339) · John P. Tarbox (13) · Brewer & Son (12) · None (11) · Boult, Wade & Tennant (10) · Marks & Clerk (9) · Haseltine, Lake & Co. (7) · Randolph, Jr. (5) · Herbert Haddan & Co. (4) · Mewburn, Ellis & Pryor (4) · Victor J. Evans (4) · J. D. Roots & Co. (3) · Joseph F. O'Brien (3) · Munn & Co. (3) · Herbert H. Thompson‎‎ (3)
National tech categories: (Click arrow to add another value)
IPCs:
None (397) · IPC B64C3/00 (13) · IPC B64C3/18 (11) · IPC B64C39/00 (9) · IPC B64C35/00 (6) · IPC B64C1/06 (6) · IPC B64C11/04 (5) · IPC B64C13/12 (5) · IPC B64C13/00 (5) · IPC B64C1/00 (5) · IPC B64C27/04 (4) · IPC B64C11/00 (3) · IPC B64C13/24 (3) · IPC B64C11/20 (3) · IPC B64C11/22 (3) · IPC B64C3/38 (3)
CPCs:
CPC B64C3/00 (47) · CPC B64C2700/6295 (34) · CPC B64C13/00 (25) · CPC B64C23/005 (24) · CPC B64C2700/6235 (23) · CPC B64B1/00 (20) · CPC B64C35/00 (19) · CPC B64C2001/0063 (17) · CPC B64C2700/6233 (17) · CPC B64C17/00 (17) · CPC B64C3/185 (17) · CPC B64C39/00 (15) · CPC B64C2700/6256 (15) · CPC B64C2001/0081 (11) · CPC B64C11/04 (11) · CPC B64C3/18 (10) · CPC B64C25/60 (10) · CPC B64C1/065 (9) · CPC B64B1/40 (9) · CPC B64C33/02 (8)
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Citations from after 1930:
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