Sound producing device

Details Sound producing device Sound producing device

1999-05-11

2000-08-01

Lefkowitz, Edward

Communications: electrical

Audible indication

Electronic

3403841, G08B 300

Patent

active

060972815

ABSTRACT:
A sound producing device separated into a sound producing unit and a power supplying unit. One of two products forming a set is provided with the sound producing unit, the other is provided with the power supplying unit for supplying a power to the sound producing unit so that the sound information can be produced only when the two products are electrically connected each other, whereby the volumes of the products are decreased and their commercial values are increased.

REFERENCES:
patent: 4810997 (1989-03-01), Kudo et al.
patent: 5264656 (1993-11-01), Itakura et al.
patent: 5533290 (1996-07-01), Lee et al.
patent: 5651716 (1997-07-01), Mowrer et al.

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