Patent DE-1920-417049
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Cites as precedent (under the Union Treaty of June 2, 1911) both Patent AU-1914-14892 and Patent US-1918-1589780. These two patents differ substantially but both relate to airfoil systems. (The citation of the second US patent also indicates that it didn't have a prior filing in Australia.)
The illustrations from the two earlier patents (16 + 8 = 24) are all used.
Both Wragg and Greenewald are filing from Washington (State?) USA.
- W 55510 XI/77h5
Sources
- Original patent document and Bibliographic info at DPMA
- Original patent document and bibliography entry at espacenet
| Year filed | 1920 |
|---|---|
| Year granted | 1925 |
| Office | DE |
| Patent number | 417049 |
| Inventors | Charles Arthur Wragg, Eugene Ludwig Greenewald |
| Inventor country | US, AU |
| Applicant person | Charles Arthur Wragg, Eugene Ludwig Greenewald |
| Applicant firm | |
| Applicant type | INDIV |
| Applicant is inventor? | 1 |
| Original title | Flugzeug mit hintereinander angeordneten Tragflächen |
| English title | Airplane with airfoils arranged one behind another |
| Tech fields | airplane, airfoil, Tragfläche |
| Filing date | 1920-06-15 |
| Full specification filed date | |
| Application number | |
| Grant date | |
| Granted? | 1 |
| Publication date | 1925-08-06 |
| Supplementary to patent | Patent AU-1914-14892, Patent US-1918-1589780 |
| Related to aircraft? | 1 |
| Serial number | |
| Patent agent | |
| Assigned to | |
| National tech categories | DE 77h.5 |
| IPCs | IPC B64C21/08 |
| CPCs | CPC B64C13/30, CPC B64C9/18, CPC Y02T50/10 |
| Family year | 1914 |
| First filing? | 0 |
| Cites these patents | |
| Citations from after 1930 | |
| Application ID | |
| INPADOC family ID | |
| Number of text pages | 4 |
| Number of diagram pages | 2 |
| Number of figures | 24 |
| Number of claims | 10 |
