Penlight magnifier attachment

Details Penlight magnifier attachment Penlight magnifier attachment

1981-09-11

1984-01-10

Burke, Wallace R.

Photography and optical equipment

Optical article not elsewhere specified

Lens or objective

D16136, D1606

Patent

active

D02721589

REFERENCES:
patent: D173684 (1954-12-01), Simpson
patent: D196452 (1963-10-01), Burlin
patent: D218537 (1970-08-01), Bushon
patent: D233733 (1974-11-01), Byerely
patent: D236028 (1975-07-01), Schroeder
patent: D240681 (1976-07-01), Granatelli
patent: D246047 (1977-10-01), Zalman
patent: D251684 (1979-04-01), Wood et al.
patent: 1909662 (1933-05-01), Conners
patent: 2725788 (1955-12-01), Pfleger

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