Photographic close up setting apparatus

Photography and optical equipment – Projector or viewer – With provision for transparency magazine

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D1603

Patent

active

D02633132

REFERENCES:
patent: 2684020 (1954-07-01), Kellner
patent: 4030114 (1977-06-01), Telfer
patent: 4095246 (1978-06-01), Kellner
The British Journal of Photography, p. XIV, Feb. 17, 1978, (lower right corner), (Also in Dec. 16, 1977).

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