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Mackay Radio & Telegraph Co

Mackay Rad

Active Patents

0

Total Holdings

5

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US2678390A	Electronic timing relay	Expired / Lapsed	1951-10-31	1954-05-11	0	Details
US2256539A	Altimeter	Expired / Lapsed	1939-10-19	1941-09-23	0	Details
US2256538A	Phase shifting device and circuits incorporating the same	Expired / Lapsed	1939-10-10	1941-09-23	0	Details
US2159648A	Transmission modifying network	Expired / Lapsed	1937-09-08	1939-05-23	0	Details
US2147809A	High frequency bridge circuits and high frequency repeaters	Expired / Lapsed	1937-05-04	1939-02-21	0	Details