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Patents > Inventor country : AT or BE or US & Grant date: 1912 & IPCs: None & First filing : Yes or None

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Tech fields:
None (198) · airplane (40) · frame (23) · stability (22) · propeller (16) · navigation (13) · wheels (12) · Design (11) · rudder (9) · propulsion (9) · HTA (9) · whole (8) · safety (8) · propellers (8) · helicopter (8) · Wings (8) · construction (7) · Aerodynamics (7) · LTA (7) · airship (6)
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Patent agent:
None (206) · Victor J. Evans (10) · Munn & Co. (9) · None (4) · Joshua R. H. Potts (3) · G. L. Cragg (2) · Knight & Co. (2) · H. C. Evert & Co. (2) · Beckert & Blakeslee (2) · Sigmund Herzog (2) · G. H. Strong (2)
National tech categories:
None (35) · USPC 244/80 (15) · USPC 244/22 (11) · USPC 244/90R (10) · USPC 244/48 (10) · USPC 244/45R (10) · USPC 244/93 (9) · USPC 244/35R (9) · USPC 244/6 (8) · USPC 244/87 (7) · USPC 244/76R (7) · USPC 244/234 (7) · USPC 244/144 (6) · USPC 244/46 (6) · USPC 244/65 (5) · USPC 244/51 (5) · USPC 244/66 (5) · USPC 244/113 (5) · AT 77d (5) · USPC 244/231 (5)
IPCs: (Click arrow to add another value)
CPCs:
CPC B64C2700/6295 (30) · CPC B64C13/00 (26) · CPC B64C17/00 (24) · CPC B64C23/005 (22) · None (21) · CPC B64C3/385 (21) · CPC B64C33/02 (13) · CPC B64C3/14 (12) · CPC B64C13/24 (10) · CPC B64C11/006 (10) · CPC B64B1/00 (9) · CPC B64B1/40 (7) · CPC B64C39/08 (6) · CPC B64C27/12 (5) · CPC B64C3/40 (5) · CPC B64C27/006 (5) · CPC B64C39/005 (5) · CPC B64C29/0033 (4) · CPC B64C27/82 (4)
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Citations from after 1930:
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