Lamp bulb with internal sound emitter actuated by energized lamp

Lighting – Light source – Electric light bulb

Patent

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Details

D10104, D26 51

Patent

active

D03402959

REFERENCES:
patent: D302860 (1989-08-01), Anema
patent: 1352860 (1920-09-01), Wise
patent: 1623761 (1927-04-01), Skaupy
patent: 2021062 (1935-11-01), Helmbright
patent: 2060637 (1936-11-01), Reid et al.
patent: 2428441 (1947-10-01), Waters
patent: 3515930 (1970-06-01), Walsh et al.
patent: 4539505 (1985-09-01), Riseberg

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