Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1975-02-14
1977-03-22
Ansher, Bernard
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1606
Patent
active
D02437619
REFERENCES:
patent: D231858 (1974-06-01), Huckenbeck
patent: 3523375 (1970-08-01), Frith et al.
patent: 3535026 (1970-10-01), Coss
patent: 3572887 (1971-03-01), Leitzsch
Selsi Co. Inc., Received Mar. 1968, p. 11, No. 217, Opera Glasses.
Ansher Bernard
Bausch & Lomb Incorporated
Parker Robert L.
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