Electronic calculating machine

Details Electronic calculating machine Electronic calculating machine

1975-05-27

1977-02-01

Burke, Wallace R.

Lighting

Light source

Electric light bulb

D1801

Patent

active

D02432498

REFERENCES:
patent: D220659 (1971-05-01), Yamamoto
patent: D234773 (1975-04-01), Herr et al.
patent: D235879 (1975-07-01), Kitai
patent: D235880 (1975-07-01), Yoshida et al.

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