Patent:US2235590
Patent: | US 2235590 |
Titel: | Apparatus for Determining Proper Exposure in Making Photographic Prints |
Datum: | 18.03.1941 |
Ort: | |
Land: | USA |
Person: | H. P. Rockwell, Jr. |
Firma: | |
Links im Rechnerlexikon: | |
Schlagworte: | |
Link zum Patentamt: (ohne Garantie) | US2235590 (espacenet), US2235590 (uspto) |
- DATUM: 18.03.1941
- TITEL: Apparatus for determining proper exposure in making photographic prints
- PERSON: WESTON ELECTRICAL INSTR CORP
- Patent Family: ( Patent:US2235590, Patent:US2306641 )