CPC B64D2700/62842
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Counter-rotating propellers driven by one engine
| Enclosing categories | CPC B64D/62 |
|---|---|
| Subcategories | |
| Keywords | Propellers |
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| End year |
Patents in category CPC B64D2700/62842
- Patent FR-1909-418209 (English title: Aviation propeller apparatus, Filing date: 1909-09-21, Applicant firm: Société “Aviator”)
- Patent FR-1910-426683.13850 (English title: Airplane, particularly using propellers in braking, Inventors: Raphael-Louis-Marie Bertin, Supplementary to patent: Patent FR-1910-426683, Filing date: 1910-09-10)
