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Automatic Switch Co

Automatic

Active Patents

0

Total Holdings

5

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US3540471A	Speed control valve	Expired / Lapsed	1968-12-03	1970-11-17	0	Details
US3300650A	Power line failure detection system	Expired / Lapsed	1963-04-12	1967-01-24	1	Details
US2998551A	Frequency-responsive relay system	Expired / Lapsed	1958-07-24	1961-08-29	0	Details
US2775982A	Differential-piston valve and dual pilot-valve control ther…	Expired / Lapsed	1954-05-04	1957-01-01	0	Details
US2624585A	Four-way valve	Expired / Lapsed	1951-02-19	1953-01-06	0	Details