Grooved base for an electric light bulb

Details Grooved base for an electric light bulb Grooved base for an electric light bulb

1994-02-07

1995-01-31

Burke, Wallace R.

Lighting

Light source

Electric light bulb

Patent

active

D03550389

REFERENCES:
patent: 2700143 (1955-01-01), Zandgraf
patent: 4254363 (1981-03-01), Walsh
patent: 4816977 (1989-03-01), Sorensen
patent: 5252888 (1993-10-01), Jopel et al.

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