Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1976-11-17
1981-02-24
Lucas, Susan J.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1606
Patent
active
D02583623
REFERENCES:
patent: 1833792 (1931-11-01), Pfaus et al.
patent: 3055267 (1962-09-01), Catt
patent: 3582193 (1971-06-01), Bogyos
patent: 3874775 (1975-04-01), Lazarus
Bausch & Lomb Optical Co. Catalog, Mar. 1956, p. 12, Temple (bottom) J51.
Optical Journal and Review of Optometry, Oct. 15, 1957, p. 29 (FIG. 2) Temple.
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