Patent:US2462339
Patent: | US 2462339 |
Titel: | Photoelectric exposure time and paper selector for photographic enlargers having Slide Rule type computers and stepwedges |
Datum: | 22.02.1949 |
Ort: | |
Land: | USA |
Person: | Alfred Simmon |
Firma: | Simmon Brothers Inc |
Links im Rechnerlexikon: | |
Schlagworte: | |
Link zum Patentamt: (ohne Garantie) | US2462339 (espacenet), US2462339 (uspto) |
- DATUM: 22.02.1949
- TITEL: Photoelectric exposure time and paper selector for photographic enlargers having slide rule type computers and stepwedges
- PERSON: SIMMON BROTHERS INC