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Combined Optical Industries Ltd

Combined O
Active Patents
0
Total Holdings
2

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
GB502978A Improvements in sheets, windows, lenses and other optical d… Expired / Lapsed 1937-10-01 — 0 Details
US2314838A Optical lens and similar device Expired / Lapsed 1936-06-08 1943-03-23 0 Details