Patent FR-1908-394168
Jump to navigation
Jump to search
- Inventor location: Dufwa emigrated from Sweden to Mexico. He cites his Swedish patent, and this is a foreign filing of it. He was in Mexico City for most of his early aero work.
- Parent patent was filed 1908-07-31
Patent family descending from Patent SE-1908-29342
- Patent SE-1908-29342 (English title: Balancing device for flying machines, Filing date: 1908-07-31, National tech categories: SE 62b • SE 70a)
- Patent FR-1908-394168 (English title: Balancing equipment for flying machines, Supplementary to patent: Patent SE-1908-29342, Filing date: 1908-08-29, National tech categories: FR 6.4)
Sources
- Original patent document and bibliography entry on espacenet
- Patent FR394168A on google patents
- L'Aérophile, Mar 1, 1909, p117
| Year filed | 1908 |
|---|---|
| Year granted | 1909 |
| Office | FR |
| Patent number | 394168 |
| Inventors | Fredrik Wilhelm Dufwa |
| Inventor country | MX |
| Inventor location | |
| Applicant person | Fredrik Wilhelm Dufwa |
| Applicant firm | |
| Applicant type | INDIV |
| Applicant is inventor? | 1 |
| Original title | Dispotif équilibrant pour machines volantes |
| English title | Balancing equipment for flying machines |
| Tech fields | aviation, stability |
| Filing date | 1908-08-29 |
| Full specification filed date | |
| Application number | 394168D |
| Grant date | 1908-11-19 |
| Granted? | 1 |
| Publication date | 1909-01-16 |
| Supplementary to patent | Patent SE-1908-29342 |
| Related to aircraft? | 1 |
| Serial number | |
| Patent agent | J. Germain |
| Assigned to | |
| National tech categories | FR 6.4 |
| IPCs | IPC B64C1/00 |
| CPCs | CPC B64C2700/6228, CPC B64C1/00 |
| Family year | 1908 |
| First filing? | 0 |
| Cites these patents | |
| Citations from after 1930 | |
| Application ID | 19213620 |
| INPADOC family ID | 5292757 |
| Number of text pages | 3 |
| Number of diagram pages | 2 |
| Number of figures | 17 |
| Number of claims | 4 |
