Disposable hand held verifier

Photography and optical equipment – Optical article not elsewhere specified – Lens or objective

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1606

Patent

active

D04112156

REFERENCES:
patent: D166170 (1952-03-01), Blum
patent: D213805 (1969-04-01), Annis
patent: D216741 (1970-03-01), Bosma
patent: D217506 (1970-05-01), Knoetgen
patent: D224446 (1972-07-01), Orfei
patent: 3409348 (1968-11-01), Annis et al.

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