Inspection device

Photography and optical equipment – Optical article not elsewhere specified

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D02742772

REFERENCES:
patent: D104257 (1937-04-01), Hayes
patent: D110582 (1938-07-01), Hartman
patent: D138690 (1944-09-01), Downing
patent: D186620 (1959-11-01), Wittie
patent: D236284 (1975-08-01), Miller
patent: D245954 (1977-10-01), Tosaw
patent: D261001 (1981-09-01), Michaels et al.
Marine Propulsion International, Jul.-Aug. 1979 issue, Cover Page, pp. 45-46 plus unnumbered Ad. page.
"Fibreoptics for Industry", Mar./Apr. 1977 issue, 4 page reprint, pp. 25, 26, 27 plus 1 article describes Prior Art Device.

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