Photography and optical equipment – Optical article not elsewhere specified – Lens or objective
Patent
1986-07-28
1989-03-21
Lucas, Susan J.
Photography and optical equipment
Optical article not elsewhere specified
Lens or objective
D16116, D16121
Patent
active
D03003299
REFERENCES:
patent: D116038 (1939-08-01), Lux
patent: D170033 (1953-07-01), Spencer
patent: D215574 (1969-10-01), Huggins
Popular Mechanics 2-1954, p. 274, "Eye Movement Glasses".
Heflin Clare E.
Lucas Susan J.
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