Geometrical instruments – Area integrators – Electrical
Patent
1980-04-21
1981-11-10
Haroian, Harry N.
Geometrical instruments
Area integrators
Electrical
33200, G01B 500
Patent
active
042990327
ABSTRACT:
A device for use in determining the minimum size of ophthalmic lens blank which may be made to fit a desired spectacles frame or the largest frame for a given lens blank size.
REFERENCES:
patent: 1438519 (1922-12-01), Covelle
patent: 1790572 (1931-01-01), Bugbee
patent: 2755553 (1956-07-01), Vaughan
patent: 3740857 (1973-06-01), Nerad
American Optical Corporation
Haroian Harry N.
Spencer Alan H.
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