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Geophysical Service Inc

Geophysica

Active Patents

0

Total Holdings

4

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US2548049A	Magnetic amplifier	Expired / Lapsed	1948-07-10	1951-04-10	0	Details
US2462552A	Initial attenuator control	Expired / Lapsed	1943-01-25	1949-02-22	0	Details
US2265513A	Prospecting method and apparatus	Expired / Lapsed	1939-06-10	1941-12-09	0	Details
US2085664A	Method and apparatus for determining porosity of rock forma…	Expired / Lapsed	1935-08-09	1937-06-29	0	Details