Photography and optical equipment – Optical article not elsewhere specified – Lens or objective
Patent
1987-05-11
1990-05-08
Holtje, Nelson C.
Photography and optical equipment
Optical article not elsewhere specified
Lens or objective
D16107, D16129
Patent
active
D03077578
REFERENCES:
patent: 4692002 (1987-09-01), Meistrell
patent: 4820036 (1989-04-01), Seet
Freiburger Thomas M.
Heflin Clare E.
Holtje Nelson C.
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