Patent FR-1917-478440.20504
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This is the second addition to Patent FR-1915-478440, which original brevet was filed 1915-04-19.
Sources
- Original patent document and bibliography entry on espacenet
- Inventor location: Daumsenil 48, Paris, département Seine
| Year filed | 1917 |
|---|---|
| Year granted | 1918 |
| Office | FR |
| Patent number | 20504 |
| Inventors | Edmond-Louis Douhéret |
| Inventor country | FR |
| Applicant person | Edmond-Louis Douhéret |
| Applicant firm | |
| Applicant type | INDIV |
| Applicant is inventor? | Yes |
| Original title | Machine volante hélicoplane |
| English title | Flying machine helicoplane |
| Tech fields | hybrid, helicoplane |
| Filing date | 1917/04/23 |
| Full specification filed date | |
| Application number | 20504D |
| Grant date | 1918/01/18 |
| Granted? | Yes |
| Publication date | 1918/05/08 |
| Supplementary to patent | Patent FR-1915-478440 |
| Related to aircraft? | Yes |
| Serial number | |
| Patent agent | None |
| Assigned to | |
| National tech categories | FR 6.4 |
| IPCs | IPC B64C25/00 |
| CPCs | CPC B64C25/06, CPC B64F2700/6226, CPC B64C25/60 |
| Family year | 1915 |
| First filing? | Yes |
| Cites these patents | |
| Citations from after 1930 | |
| Application ID | 18731578 |
| INPADOC family ID | 5202552 |
| Number of text pages | 2 |
| Number of diagram pages | 1 |
| Number of figures | 4 |
| Number of claims | 2 |
