Thermostat magnifier

Details Thermostat magnifier Thermostat magnifier

1983-06-06

1984-12-11

Burke, Wallace R.

Photography and optical equipment

Optical article not elsewhere specified

Lens or objective

Patent

active

D02767317

REFERENCES:
patent: D99267 (1936-04-01), Clark
patent: D136848 (1943-12-01), Dreyfuss
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patent: D180443 (1957-06-01), Dreyfuss
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patent: D189498 (1960-12-01), Collins
patent: D190050 (1961-04-01), Duncan
patent: D217500 (1970-05-01), O'Connell
patent: D248838 (1978-08-01), Pasquanette et al.
patent: 855473 (1907-06-01), McAlpine
patent: 1788011 (1931-01-01), Bryce
patent: 2107720 (1938-02-01), Sworden
patent: 2312542 (1943-03-01), Goodman
patent: 2533628 (1950-12-01), Rosenberg
patent: 3546778 (1970-12-01), Lepkowski
Rapkin "Clarity" Magnifiers, Advent, Semet, published by Mekeels Weekly Stamp News, vol. LIV, No. 7, 2/12/1940, p. 138.
Honeywell Tradeline Controls, Thermostat publication, pp. 127 and 128.

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