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Patents > Patent agent : Brewer & Co. or None & Family year: 1917

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Tech fields:
None (242) · airplane (37) · design (25) · airship (23) · construction (20) · frame (19) · instrument (18) · fuselage (16) · Propellers (16) · control (14) · propeller (13) · stability (13) · subsystem (12) · wings (12) · LTA (11) · rudder (8) · safety (7) · HTA (7)
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National tech categories:
None (268) · HU V/h (35) · DE 77h.5 (26) · AT 77d (11) · DE 77h.6 (10) · FR 6.4 (5) · DK 77 (5) · DE 77h.9 (4) · NL 62.15 (3) · NL 62 (3) · DE 77h.4 (2) · HU VII/a (2) · DE 42c.6 (2) · CA 244/120 (2)
IPCs:
None (325) · IPC B64C13/00 (7) · IPC B64C3/00 (7) · IPC B64C3/18 (5) · IPC B64C27/04 (5) · IPC B64C11/00 (5) · IPC B64C9/02 (4) · IPC B64C11/20 (3) · IPC B64C1/06 (3) · IPC B64C1/00 (3) · IPC B64C35/00 (2) · IPC B64C9/00 (2) · IPC B64C11/16 (2) · IPC B64C11/34 (2) · IPC B64B1/58 (2) · IPC B64C33/00 (2) · IPC B64B1/00 (2) · IPC G01C9/00 (2) · IPC B64C17/00 (2)
CPCs:
None (73) · CPC B64C3/00 (25) · CPC B64C13/00 (24) · CPC B64C2700/6295 (21) · CPC B64C2700/6235 (15) · CPC B64C17/00 (13) · CPC B64C3/18 (12) · CPC B64C23/005 (11) · CPC B64C2700/6256 (10) · CPC B64B1/00 (10) · CPC B64C2001/0063 (10) · CPC B64C2700/6233 (10) · CPC B64C3/185 (9) · CPC B64C2001/0081 (8) · CPC B64C35/00 (8) · CPC B64C39/00 (8) · CPC B64C2700/6281 (7) · CPC B64B1/58 (7) · CPC B64B1/40 (6) · CPC B64C11/205 (6)
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