Electronic calculating machine

Details Electronic calculating machine Electronic calculating machine

1975-08-21

1977-02-01

Burke, Wallace R.

Lighting

Light source

Electric light bulb

D1801

Patent

active

D02432510

REFERENCES:
patent: D235452 (1975-06-01), Ikeda
patent: D235879 (1975-07-01), Kitai
patent: D235880 (1975-07-01), Yoshida et al.
patent: D237195 (1975-10-01), Kitai

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