Drilldown: Patents

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Patents > Grant date: 1920 - 1929 & CPCs: CPC B64C2700/6218

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Year filed:
1913 (1) · 1914 (4) · 1915 (1) · 1916 (1) · 1917 (1) · 1918 (3) · 1920 (1)
Year granted:
1920 (6) · 1921 (4) · 1924 (2)
Office:
DE (4) · FR (4) · GB (2) · US (2)
Inventors:
None (4) · Adolph Ditriech Wittemann (1) · Charles Rudolph Wittemann (1) · Elmer A. Sperry (1) · Gaston Madeira (1) · Jacob Knappich (1) · James Vernon Martin (1) · Raimund Nimfuehr (1) · Rushmore Wood (1) · Société des Appareils d'Aviation Doutre (1) · Thomas James Taplin, Jr. (1) · Thomas James Taplin, Sr. (1)
Inventor country:
AT (1) · DE (1) · FR (3) · GB (2) · US (5)
Inventor location:
None (12)
Applicant person:
None (2) · Adolph Ditriech Wittemann (1) · Charles Rudolph Wittemann (1) · Elmer A. Sperry (1) · Gaston Madeira (1) · Jacob Knappich (1) · James Vernon Martin (2) · Raimund Nimfuehr (1) · Raymond Roze Perkins (1) · Rushmore Wood (1) · Société des Appareils d'Aviation Doutre (1) · Thomas James Taplin, Jr. (1) · Thomas James Taplin, Sr. (1)
Applicant firm:
None (9) · Goerz Optische Anstalt (1) · Société des Avions Louis Bréguet (1) · Sperry Gyroscope (1)
Applicant type:
None (1) · COMPANY (3) · INDIV (7) · INDIV+COMPANY (1)
Applicant is inventor:
No (6) · Yes (6)
Tech fields:
None (12)
Filing date:
1913 (1) · 1914 (4) · 1915 (1) · 1916 (1) · 1917 (1) · 1918 (3) · 1920 (1)
Full specification filed date:
None (12)
Application number:
None (1) · 1215216 (1) · 1914351477 (1) · 25423318 (1) · 324366D (1) · 325130D (1) · 337831D (1) · 342418 (1) · 502242D (1) · 503646D (1) · 526119D (1) · O0010755 (1)
Grant date:
1920 (6) · 1921 (4) · 1924 (2)
Granted:
Yes (12)
Publication date:
May 1920 (1) · August 1920 (1) · June 1921 (1) · October 1921 (1)
Supplementary to patent:
None (9) · Patent BE-1913-10-15-Doutre (1) · Patent FR-1914-475066 (1) · Patent GB-1918-128040 (1)
Related to aircraft:
None (1) · 1 (9) · Yes (2)
Patent agent:
None (8) · Charles Assi (1) · E. Blétry (1) · Herbert H. Thompson (1) · Paul Coulomb (1)
Assigned to:
None (11) · Sperry Gyroscope Company (1)
National tech categories:
None (5) · DE 77h.5 (3) · FR 6.4 (3) · USPC 244/177 (1) · USPC 244/181 (1) · USPC 244/79 (1) · USPC 244/81 (1) · USPC 74/5.34 (1)
IPCs:
None (5) · IPC B64C1/00 (7) · IPC B64C17/00 (7)
CPCs: (Click arrow to add another value)
Family year:
1913 (2) · 1914 (3) · 1915 (1) · 1916 (1) · 1917 (1) · 1918 (4)
First filing:
No (3) · Yes (9)
Cites these patents:
None (12)
Citations from after 1930:
None (1) · 1 (1)
Number of text pages:
None (4) · 2 (3) · 3 (2) · 4 (2) · 15 (1)
Number of claims:
None (5) · 1 (3) · 2 (1) · 3 (1) · 5 (2)
Number of diagram pages:
None (4) · 1 (7) · 6 (1)
Number of figures:
None (4) · 1 (2) · 4 (3) · 5 (2) · 18 (1)

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