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Patents > Inventor country : GB or US & Tech fields: propeller & Number of text pages: 1-2

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Office:
Inventors:
Spencer Heath (6) · Paul Petres (3) · Louis Gathmann (2) · Stewart Cairncross (2) · Edward Joel Pennington (2) · Christian Lorenzen (2) · Thomas Augustus Dring (2)
Inventor country: (Click arrow to add another value)
Applicant person:
None (29) · Spencer Heath (6) · Paul Petres (3) · Christian Lorenzen (2) · Louis Gathmann (2)
Applicant is inventor:
Tech fields: (Click arrow to add another value)
Full specification filed date:
Application number:
None (59) · 25723218 (2)
Granted:
Related to aircraft:
Patent agent:
None (47) · Victor J. Evans (6) · Munn & Co. (5) · None (4) · H. C. Everett Co. (3) · Knight Bros. (2) · Alexander Denes (2) · Geo. H. Strong (2)
National tech categories:
None (47) · USPC 244/66 (5) · DE 77h.6 (5) · USPC 244/6 (5) · USPC 244/73R (4) · USPC 244/72 (4) · USPC 244/51 (4) · USPC 244/35R (3) · USPC 244/64 (3) · USPC 244/60 (3) · USPC 244/45R (3) · USPC 244/30 (3)
CPCs:
None (14) · CPC B64B1/00 (11) · CPC B64C11/006 (10) · CPC B64C11/48 (10) · CPC B64C23/005 (9) · CPC B63H1/12 (6) · CPC B64C11/04 (6) · CPC B64C33/02 (5) · CPC B64C27/82 (5) · CPC B64C2700/6295 (5) · CPC B64C11/36 (4) · CPC B64B1/40 (4) · CPC B63H5/10 (4) · CPC B64C39/08 (4) · CPC B64C27/54 (4) · CPC B64C11/001 (3) · CPC B64C39/005 (3) · CPC B64C11/065 (3) · CPC F05B2260/74 (3) · CPC B64C9/00 (3)
First filing:
Citations from after 1930:
Number of text pages:
Number of diagram pages:

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