Patent DE-1908-239989
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Use of rigid air-chamber or ballonet with non-rigid aerostat for purpose of controlling gas pressure.
- Inventor location; Schönberg bei Berlin
Patents which are supplementary to this one
- Patent GB-1910-2302 (English title: Air-ships with Aerostats, Filing date: 1910-01-29)
- Patent FR-1910-412044 (English title: Air-Ship, Filing date: 1910-01-29)
- Patent US-1910-998538 (English title: Airship, Filing date: 1910-02-07)
- Patent HU-1910-50863 (English title: Aircraft with a device for raising and lowering the buoyancy by modification, Filing date: 1910-01-26)
Sources
- Zeitschrift für Flugtechnik und Motorluftschiffahrt Vol. 3 (1912), index p. viii
- Original patent document and Bibliographic info at DPMA
- Original patent document and bibliography entry at espacenet
| Year filed | 1908 |
|---|---|
| Year granted | 1911 |
| Office | DE |
| Patent number | 239989 |
| Inventors | Paul Lehmann |
| Inventor country | DE |
| Inventor location | |
| Applicant person | Paul Lehmann |
| Applicant firm | |
| Applicant type | INDIV |
| Applicant is inventor? | 1 |
| Original title | Vorrichtung zur Änderung der Höhenlage von starren Ballons |
| English title | Apparatus for changing the elevation of rigid balloons |
| Tech fields | LTA, navigation, control, elevation, rigid, gas, ballonet, non-rigid, balloons, air pressure |
| Filing date | 1908-01-18 |
| Full specification filed date | |
| Application number | |
| Grant date | |
| Granted? | 1 |
| Publication date | 1911-10-26 |
| Supplementary to patent | |
| Related to aircraft? | 1 |
| Serial number | |
| Patent agent | |
| Assigned to | |
| National tech categories | DE 77h.3 |
| IPCs | IPC B64B1/62 |
| CPCs | CPC B64B1/62 |
| Family year | 1908 |
| First filing? | 1 |
| Cites these patents | |
| Citations from after 1930 | |
| Application ID | |
| INPADOC family ID | |
| Number of text pages | 2 |
| Number of diagram pages | 1 |
| Number of figures | 2 |
| Number of claims | 1 |
