Patent US-1911-989490
Jump to navigation
Jump to search
| Year filed | 1909 |
|---|---|
| Year granted | 1911 |
| Office | US |
| Patent number | 989490 |
| Inventors | John J. DONNELLY |
| Inventor country | US |
| Applicant person | |
| Applicant firm | |
| Applicant type | |
| Applicant is inventor? | 1 |
| Original title | Aerial apparatus of the heavier-than-air class |
| English title | Aerial apparatus of the heavier-than-air class |
| Tech fields | Helicopter |
| Filing date | propulsion |
| Full specification filed date | propeller |
| Application number | frame |
| Grant date | 1909-08-09 |
| Granted? | |
| Publication date | |
| Supplementary to patent | 1911-04-11 |
| Related to aircraft? | Yes |
| Serial number | |
| Patent agent | |
| Assigned to | 1 |
| National tech categories | FR 511855 |
| IPCs | |
| CPCs | |
| Family year | USPC 244/17.15 |
| First filing? | |
| Cites these patents | 1911 |
| Citations from after 1930 | |
| Application ID | |
| INPADOC family ID | |
| Number of text pages | |
| Number of diagram pages | |
| Number of figures | |
| Number of claims |
Sources
{{USpatentsources|989490 espacenet] Double-propeller system, using larger propeller above and smaller one below/within; some discourse on the aerodynamical advantages of this arrangement Inventor location (imputed by HistPat): Denver, Denver county, CO (FIPSloc=8031)
