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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)

Aus der Patentschrift US2462339

• 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