Photography and optical equipment – Optical article not elsewhere specified – Lens or objective
Patent
1981-09-23
1984-11-13
Lucas, Susan J.
Photography and optical equipment
Optical article not elsewhere specified
Lens or objective
Patent
active
D02763494
REFERENCES:
patent: 3610742 (1971-10-01), Page
patent: 4176921 (1979-12-01), Matthias
Optical Journal & Review of Optometry, 11-1976, p. 26, Frames.
Optometric Weekly, 10-12-1972, p. 18 "Caravan" Frames.
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