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PHOTO RES CORP

PHOTO RES

Active Patents

0

Total Holdings

5

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US2865247A	Compound photometric device	Expired / Lapsed	1955-10-10	1958-12-23	0	Details
US2755428A	Regulated d. c. power supply	Expired / Lapsed	1954-09-20	1956-07-17	0	Details
US2587602A	Color temperature meter and spectrometer	Expired / Lapsed	1949-01-31	1952-03-04	0	Details
US2587601A	Direct reading color temperature meter	Expired / Lapsed	1948-09-17	1952-03-04	0	Details
US2579661A	Light measuring meter	Expired / Lapsed	1949-04-28	1951-12-25	0	Details