Patent FR-1911-417989.14395
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This is the second addition to Patent FR-1910-417989, which brevet was filed 1910-06-25.
Oddly perhaps, Espacenet gives no IPC or CPC classification to this patent.
We could get back to this, but it specifically has to do with the "hélicoïde".
Sources
- Original patent document and bibliography entry on espacenet
- Inventor location: département Seine-Inférieure, France
| Year filed | 1911 |
|---|---|
| Year granted | 1911 |
| Office | FR |
| Patent number | 14395 |
| Inventors | Édouard-Jean Bigourdan |
| Inventor country | FR |
| Applicant person | Édouard-Jean Bigourdan |
| Applicant firm | |
| Applicant type | INDIV |
| Applicant is inventor? | Yes |
| Original title | Biplan concentrique à mouvements contraires |
| English title | Concentric biplane with contrary movements, actually a helicopter, featuring two counter-rotating blades, or sets of blades |
| Tech fields | design, propellers, propulsion, helicopter |
| Filing date | 1911/06/07 |
| Full specification filed date | |
| Application number | 14395D |
| Grant date | 1911/09/26 |
| Granted? | Yes |
| Publication date | 1911/11/27 |
| Supplementary to patent | Patent FR-1910-417989 |
| Related to aircraft? | Yes |
| Serial number | |
| Patent agent | de Bongé |
| Assigned to | |
| National tech categories | FR 6.4 |
| IPCs | |
| CPCs | |
| Family year | 1910 |
| First filing? | No |
| Cites these patents | |
| Citations from after 1930 | |
| Application ID | 335557519 |
| INPADOC family ID | 5198345 |
| Number of text pages | 2 |
| Number of diagram pages | 0 |
| Number of figures | 0 |
| Number of claims | 6 |
