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Patents > Year granted: 1920 & Applicant firm : Sperry Gyroscope Company or None

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Year granted:
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Inventors:
None (27) · Paul Schmitt (6) · John William Rapp (5) · Émile Letord (4) · Christian Lorenzen (4) · Gianni Caproni (4) · Francis J PLYM (3) · Louis Renault (3) · Louis Lacoin (3) · Alliott Verdon Roe (3) · Joseph Vanorio (3) · Alexis Beurrier (3) · Édouard-Jean Bigourdan (3) · Harris G Hooper (3) · Adolphe Clément-Bayard (3) · Ralph Hazlett UPSON (3) · Hermann Faehrmann (3)
Inventor country:
Applicant person:
None (18) · Frederick Handley Page (7) · John William Rapp (7) · Paul Schmitt (6) · Émile Letord (4) · KAWNEER (4) · Gianni Caproni (4) · Hermann Faehrmann (3) · James Vernon Martin (3) · Louis Renault (3) · Louis Lacoin (3) · Joseph Vanorio (3) · HANRIOT (3) · Harris G Hooper (3) · Christian Lorenzen (3) · Adolphe Clément-Bayard (3) · Alliott Verdon Roe (3) · Alexis Beurrier (3)
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Supplementary to patent:
None (250) · Patent CA-1918-192493 (2) · Patent FR-1915-502520 (2)
Related to aircraft:
Patent agent:
None (170) · Armengaud jeune (9) · None (9) · J. Germain (8) · M. Zerolo (7) · Marks & Clerk (4) · Émile Bert (3) · Brandon frères (3) · Hippolyte Josse (3) · Munn & Co. (3) · Weismann et Marx (3)
National tech categories:
None (180) · FR 6.4 (50) · DE 77h.5 (10) · HU V/h (8) · DE 77h.6 (6) · NL 62 (3) · FR 6.2 (3) · USPC 244/22 (2) · FR 6.8 (2) · FR 5.8 (2) · USPC 244/50 (2) · FR 12.2 (2) · DE 77h.9 (2) · USPC 244/90R (2) · DE 77h.7 (2) · DE 77h Group 5 (2)
IPCs:
None (140) · IPC B64C3/00 (11) · IPC B64C39/00 (10) · IPC B64C13/00 (10) · IPC B64C17/00 (8) · IPC B64C23/00 (8) · IPC B64C11/00 (8) · IPC B64C25/00 (6) · IPC B64C1/00 (6) · IPC B64C1/06 (6) · IPC B64C11/04 (6) · IPC B64C3/56 (5) · IPC B64C35/00 (4) · IPC B64C11/36 (4) · IPC B64C33/00 (4) · IPC B64D27/00 (3) · IPC B64C13/12 (3) · IPC B64C3/18 (3)
CPCs:
None (22) · CPC B64C3/00 (19) · CPC B64C17/00 (16) · CPC B64C13/00 (16) · CPC B64C2700/6256 (14) · CPC B64C11/04 (12) · CPC B64C39/00 (12) · CPC B64C23/005 (12) · CPC B64C2700/6295 (10) · CPC B64C2700/6233 (10) · CPC B64C3/18 (7) · CPC B64C2700/6274 (7) · CPC B62C5/04 (7) · CPC B64C3/56 (6) · CPC B64C2700/6212 (6) · CPC B64C3/185 (6) · CPC B64C11/00 (6) · CPC B64F2700/6226 (6) · CPC B64C35/00 (6)
First filing:
Citations from after 1930:
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