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MERCANTILE NATIONAL BANK AT DALLAS

MERCANTILE

Active Patents

0

Total Holdings

5

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US3993955A	Method of and apparatus for establishing emergency communic…	Expired / Lapsed	1975-04-25	1976-11-23	10	Details
US3987397A	Remote unit for a two-way cable communications system	Expired / Lapsed	1975-04-25	1976-10-19	14	Details
US3846703A	Noise control system for transmission network	Expired / Lapsed	1973-02-28	1974-11-05	23	Details
US3803491A	Communications system	Expired / Lapsed	1972-01-26	1974-04-09	31	Details
US3794922A	Data sampling communication system	Expired / Lapsed	1972-01-26	1974-02-26	11	Details