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Patents > Filing date: 1909 & IPCs: None & First filing: Yes

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Tech fields:
None (163) · airplane (77) · frame (69) · propeller (58) · propulsion (51) · navigation (43) · stability (40) · rudder (39) · LTA (36) · design (25) · wheels (21) · car (21) · propellers (20) · helicopter (17) · hybrid (15) · whole (15) · balloon (15) · lift (14)
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Patent agent:
None (238) · Munn & Co. (10) · None (4) · Michael J. Stark & Sons (4) · Watson E. Coleman (3) · Victor J. Evans (3) · Frank T. Wentworth (3) · E. Blum & Co. (2) · W. J. FitzGerald & Co. (2) · Spencer Heath (2) · R. S. & A. B. Lacey (2) · Marks & Clerk (2) · Joshua R. H. Potts (2) · James L. Norris (2) · J. Owden O'Brien (2) · Henry Hughes (2) · Woodward & Chandler (2) · Armengaud jeune (2)
National tech categories:
None (150) · HU V/h (15) · FR 6.4 (8) · USPC 244/93 (7) · USPC 244/80 (7) · USPC 244/22 (6) · USPC 244/66 (6) · AT 77d (6) · USPC 244/87 (6) · USPC 244/20 (5) · USPC 244/48 (5) · USPC 244/6 (5) · USPC 244/13 (4) · USPC 244/51 (4) · USPC 244/82 (4) · USPC 244/119 (4) · USPC 244/72 (4) · USPC 244/73R (4) · USPC 244/45R (4)
IPCs: (Click arrow to add another value)
CPCs:
None (63) · CPC B64C2700/6295 (31) · CPC B64B1/00 (22) · CPC B64C33/02 (19) · CPC B64C13/00 (17) · CPC B64C3/385 (17) · CPC B64C39/005 (15) · CPC B64C23/005 (15) · CPC B64C11/006 (15) · CPC B64C17/00 (13) · CPC B64B1/58 (11) · CPC B64C39/00 (11) · CPC B64C33/00 (8) · CPC B64C11/36 (7) · CPC B64C39/08 (7) · CPC B64C27/82 (6) · CPC B64C9/00 (5) · CPC B64B1/40 (5) · CPC B64C27/54 (5)
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Citations from after 1930:
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