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IPSOPHON PATENTGESELLSCHAFT A

IPSOPHON P
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US2553410A Device for eliminating silent periods between intermittent … Expired / Lapsed 1947-01-17 1951-05-15 0 Details
US2489638A Arrangement for switching on and initiating processes by me… Expired / Lapsed 1945-03-20 1949-11-29 0 Details