Drilldown: Patents

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Patents > Year filed: 1917 & Granted: Yes & IPCs: None

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Tech fields:
None (243) · airplane (49) · Airship (28) · design (20) · propellers (18) · frame (17) · construction (17) · instrument (16) · LTA (15) · stability (15) · subsystem (14) · military (11) · wings (11) · control (9) · engine (9) · safety (9) · propulsion (8) · aerodynamics (8)
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Supplementary to patent:
None (365) · Patent DE-1917-02-16 Oscar Gerhardt (2) · Patent US-1916-1289206 (2) · Patent HU-1917-77280 (2) · Patent HU-1917-73345 (2) · Patent GB-1916-112641 (2) · Patent GB-1916-109146 (2) · Patent DE-1917-300978 (2) · Patent DE-1916-10-07 Oscar Gerhardt (2)
Related to aircraft:
Patent agent:
None (335) · John P. Tarbox (10) · Victor J. Evans (4) · Randolph, Jr. (4) · Fred Walsh (3) · Munn & Co. (3) · Watson E. Coleman (2) · James L. Norris (2) · Phillipss (2) · Hans Heimann (2) · None (2)
National tech categories:
None (295) · HU V/h (54) · AT 77d (16) · AU 90.5 (5) · DK 77 (5) · DE 77h.5 (4) · DE 42k.18 (3) · HU VII/a (2) · AT 78b (2) · FR 6.4 (2) · DE 77h.6 (2) · CA 341/80 (2)
IPCs: (Click arrow to add another value)
CPCs:
None (121) · CPC B64C2700/6295 (28) · CPC B64C23/005 (25) · CPC B64C3/00 (23) · CPC B64C17/00 (15) · CPC B64C35/00 (13) · CPC B64C13/00 (13) · CPC B64B1/00 (13) · CPC B64C2700/6233 (11) · CPC B64C39/00 (10) · CPC B64C25/60 (8) · CPC B64C2700/6274 (7) · CPC B64C2700/6235 (6) · CPC B64C33/02 (6) · CPC B64C11/006 (6) · CPC B64C2001/0081 (5) · CPC B64C11/36 (5) · CPC B64C3/185 (5) · CPC B64B1/40 (5)
First filing:
Citations from after 1930:
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