USPC 244/68
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U.S. patent classification subclass 244/68 is for patents related to elongated propellers: Arrangement of aircraft screw propellers of the long helix type, in which the blades extend for substantially a full pitch length or more along the hub members.[1][2]
- USPC 244/67 for elongated propellers arranged to rotate about the external periphery of some aircraft body
- USPC 244/73 for elongated propellers arranged in tubes for fluid propulsion
References
- ↑ 1.0 1.1 Description of category USPC 244/68 at uspto.gov
- ↑ Class 244: Aeronautics, Manual of U.S. Patent Classification, as of June 30, 2000
- ↑ https://www.uspto.gov/web/offices/ac/ido/oeip/taf/def/244.htm#68
Patents in category USPC 244/68
- Patent US-1904-804593 (English title: Flying machine, Inventors: Albert Hugo Friedel, Filing date: 1904-08-20)
- Patent US-1906-861740 (English title: Flying-machine, Inventors: Edward M. La Penotiere, Filing date: 1906-12-24)
- Patent US-1907-916456 (English title: Airship, Inventors: Oscar J. Laisy, Filing date: 1907-05-04)
- Patent US-1909-932712 (English title: Airship, Inventors: Enoch S Le Fevre • William David Le Fevre, Filing date: 1908-02-20)
- Patent US-1909-993623 (English title: Flying-machine aeroplane, Inventors: John T. Rydberg, Filing date: 1909-03-22)
- Patent US-1912-1025539 (Inventors: Frank ROSBORY, Filing date: 1910-09-23)
- Patent US-1911-1009915 (English title: Aerial Turbine Ship, Inventors: Arthur McLean, Filing date: 1911-01-06)
- Patent US-1911-1031840 (English title: Flying-machine, Inventors: Albert I. Crenshaw, Filing date: 1911-03-25)
- Patent US-1913-1069906 (English title: Flying machine, Inventors: Henry J. Snook, Filing date: 1912-06-08)
- Patent US-1913-1105941 (English title: Flying-machine, Inventors: John Francis Tiner, Filing date: 1913-02-21)
| Enclosing categories | USPC 244/65 |
|---|---|
| Subcategories | |
| Keywords | Propellers |
| Start year | |
| End year |
