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DRAHTLOSE TELEGRAPHIE MBH

DRAHTLOSE

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0

Total Holdings

5

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US1792752A	Light control	Expired / Lapsed	1927-03-21	1931-02-17	0	Details
US1792766A	Electric-light relay	Expired / Lapsed	1927-01-05	1931-02-17	0	Details
US1708524A	Railway signaling	Expired / Lapsed	1925-12-02	1929-04-09	0	Details
US1559992A	Arrangement for frequency transformation particularly for o…	Expired / Lapsed	1922-08-18	1925-11-03	0	Details
US1489158A	Arrangement for the audible receiving of undamped oscillati…	Expired / Lapsed	1922-08-18	1924-04-01	0	Details