Patent FR-1912-439413
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Sources
- Original patent document and bibliography entry on espacenet
- on google patents
- Inventor location: département Seine, France
Patent family descending from Patent FR-1912-439413
- Patent FR-1912-439413 (English title: Concave attack and fraction of decreasing pitch propeller, National tech categories: FR 6.4)
- Patent GB-1912-12466 (English title: Improvements in the specific aerodynamics and design of propellers, Supplementary to patent: Patent FR-1912-439413)
- Patent HU-1912-61926 (English title: Propellers for flying machines and airships, Supplementary to patent: Patent FR-1912-439413, National tech categories: HU V/h)
| Year filed | 1912 |
|---|---|
| Year granted | 1912 |
| Office | FR |
| Patent number | 439413 |
| Inventors | Pierre Levasseur |
| Inventor country | FR |
| Applicant person | Pierre Levasseur |
| Applicant firm | |
| Applicant type | INDIV |
| Applicant is inventor? | Yes |
| Original title | Hélice à arete d'attaque concave et à fraction de pas décroissante |
| English title | Concave attack and fraction of decreasing pitch propeller |
| Tech fields | Propellers |
| Filing date | 1912/01/26 |
| Full specification filed date | |
| Application number | 439413D |
| Grant date | 1912/04/06 |
| Granted? | Yes |
| Publication date | 1912/06/13 |
| Supplementary to patent | |
| Related to aircraft? | 1 |
| Serial number | |
| Patent agent | Armengaud jeune |
| Assigned to | |
| National tech categories | FR 6.4 |
| IPCs | IPC B64C11/18 |
| CPCs | CPC B64C11/18 |
| Family year | 1912 |
| First filing? | Yes |
| Cites these patents | |
| Citations from after 1930 | |
| Application ID | 19257893 |
| INPADOC family ID | 5328728 |
| Number of text pages | 1 |
| Number of diagram pages | 1 |
| Number of figures | 5 |
| Number of claims | 2 |
