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Patelhold Patenverwertungs and Elektro-Holding AG

Patelhold

Active Patents

0

Total Holdings

4

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US3773977A	Method of enciphered information transmission by time-inter…	Expired / Lapsed	1971-06-21	1973-11-20	17	Details
US3164777A	Means for the production of a voltage which depends upon th…	Expired / Lapsed	1960-02-09	1965-01-05	2	Details
US2597506A	Ultra-short wave electron tube	Expired / Lapsed	1945-11-14	1952-05-20	0	Details
US2474354A	Automatic frequency control circuits	Expired / Lapsed	1943-06-04	1949-06-28	0	Details