Patent FR-1908-389974
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Flying machine (we might call it a helicopter) with two propellers rotating in opposite directions. Car structure is built with system for altering center of gravity to change the inclination and thus direction of the craft.
There's also Patent IT-1909-105393. If it's the same patent, we might assume this is the first filing, as we believe there was no Dutch patent office at the time.
Sources
- Original patent document and bibliography entry on espacenet
| Year filed | 1908 |
|---|---|
| Year granted | 1908 |
| Office | FR |
| Patent number | 389974 |
| Inventors | Louis Kloos |
| Inventor country | NL |
| Applicant person | Louis Kloos |
| Applicant firm | |
| Applicant type | INDIV |
| Applicant is inventor? | 1 |
| Original title | Machine volante |
| English title | Flying machine |
| Tech fields | whole, ascension, stability, propeller, propulsion, car, helicopter, frame |
| Filing date | 1908-05-07 |
| Full specification filed date | |
| Application number | 389974D |
| Grant date | 1908-09-23 |
| Granted? | 1 |
| Publication date | |
| Supplementary to patent | |
| Related to aircraft? | 1 |
| Serial number | |
| Patent agent | Charles Assi |
| Assigned to | |
| National tech categories | FR 6.4 |
| IPCs | |
| CPCs | CPC B64C27/28, CPC B64C2700/629 |
| Family year | 1908 |
| First filing? | 0 |
| Cites these patents | |
| Citations from after 1930 | |
| Application ID | 19209537 |
| INPADOC family ID | 5289328 |
| Number of text pages | 2 |
| Number of diagram pages | 1 |
| Number of figures | 2 |
| Number of claims |
