1977-09-01
1980-02-26
Sacher, Paul A.
350 70, 350115, 350116, 350190, 350231, G02B 1312
Patent
active
041903226
ABSTRACT:
A magnifying apparatus comprising a pair of mutually adjustable complementary magnifying elements wherein one of the elements is an elongated member having one flat surface and one transversely arcuate surface, and the other element is of a circular configuration having at least one convex surface.
REFERENCES:
patent: 1865326 (1932-06-01), Marshall
patent: 2161368 (1939-06-01), McLeod
patent: 3428286 (1969-02-01), Del Pesco
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