Electronic calculating machine

Details Electronic calculating machine Electronic calculating machine

1975-07-18

1977-02-01

Burke, Wallace R.

Lighting

Light source

Electric light bulb

D1801

Patent

active

D02432501

REFERENCES:
patent: D163135 (1951-05-01), Pangburn
patent: D230484 (1974-02-01), Yamagami
patent: D235452 (1975-06-01), Ikeda
patent: D236488 (1975-08-01), Fossella

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