Patent NL-1923-13391
This is Fokker's invention which times machine gun fire relative to propeller blade rotation. This invention, whether patented earlier or not, played a role in the German war effort. We would like to find an earlier filing.
Sources
- Original patent document and bibliography entry on espacenet
- Patent record in Netherlands Patent Office register
- Inventor location: Amsterdam
The Dutch website gives "IPC code" 62-15. This is among the oddities of the Netherlands relative to Espacenet. We are likely to establish NL 62.15
This original document shows "Aanvrage No. 25560 Ned.; ingediend 12 November 1923, 10 u. v.m. ; openbaar gemaakt 15 Januari 1925", that is, "Application no. 25560 Netherlands; filed November 12, 1923, 10 a.m. a.m. ; made public 15 January 1925". Note the application number, which is nice and clear, and different from the patent number.
This original document also shows "Uitgegeven 15 Aug, 1925" (Issued Aug 15, 1925), and "Dagteekening octrooi 16 Mei 1925" (Patent date May 16, 1925). This "issued" date is the only date shown on the original which is not shown on the Dutch website data.
| Year filed | 1923 |
|---|---|
| Year granted | 1925 |
| Office | NL |
| Patent number | 13391 |
| Inventors | Anthony Herman Gerard Fokker |
| Inventor country | NL |
| Applicant person | Anthony Herman Gerard Fokker |
| Applicant firm | |
| Applicant type | INDIV |
| Applicant is inventor? | Yes |
| Original title | Door de motor aangedreven afvuurinrichting voor vliegtuig- mitrailleurs, welke tussen de bladen van de propeller doorschieten |
| English title | Engine-driven firing device for aircraft machine guns, which shoot between the blades of the propeller |
| Tech fields | military, projectile, propellers |
| Filing date | 1923/11/12 |
| Full specification filed date | |
| Application number | 25560 |
| Grant date | 1925/05/16 |
| Granted? | Yes |
| Publication date | 1925/01/15 |
| Supplementary to patent | |
| Related to aircraft? | Yes |
| Serial number | |
| Patent agent | |
| Assigned to | |
| National tech categories | NL 62.15c |
| IPCs | IPC F41A19/05 |
| CPCs | CPC F41A19/05 |
| Family year | 1923 |
| First filing? | No |
| Cites these patents | |
| Citations from after 1930 | |
| Application ID | |
| INPADOC family ID | |
| Number of text pages | 3 |
| Number of diagram pages | 1 |
| Number of figures | 2 |
| Number of claims | 4 |
