Lighting – Light source – Electric light bulb
Patent
1990-03-09
1991-06-11
Lucas, Susan J.
Lighting
Light source
Electric light bulb
Patent
active
D03175073
REFERENCES:
patent: D36868 (1904-04-01), Gleason
patent: D82515 (1930-11-01), Niebel
patent: D209751 (1968-01-01), Jeruss
patent: D217351 (1970-04-01), Kanazawa
patent: D280446 (1985-09-01), Ishii
Haken Jack E.
Lucas Susan J.
U.S. Philips Corporation
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