Photography and optical equipment – Optical article not elsewhere specified
Patent
1992-08-10
1994-05-31
MacCormac, Cathy Anne
Photography and optical equipment
Optical article not elsewhere specified
Patent
active
D03474402
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patent: 807230 (1905-12-01), Zubli
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patent: 1451096 (1923-04-01), Hagen
patent: 2968208 (1961-01-01), Shaw
patent: 4062623 (1977-12-01), Suzuki et al.
patent: 4887893 (1989-12-01), Dahlgren
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