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FIRM FERNSEH AKTIEN GES

FIRM FERNS
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US2213769A Electron multiplier Expired / Lapsed 1937-08-19 1940-09-03 0 Details
US2201245A Cathode ray projection tube Expired / Lapsed 1937-10-22 1940-05-21 0 Details