Doorbell button

Details Doorbell button Doorbell button

1998-04-30

1999-10-05

Douglas, Alan P.

Equipment for production, distribution, or transformation of ene

Distribution, modification or control

Switch or casing therefor

1303

Patent

active

D04147480

REFERENCES:
patent: D185631 (1959-07-01), Dreyfuss
patent: D197278 (1964-01-01), Stevenson
patent: 5767465 (1998-06-01), Fulton et al.

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