Communications: electrical – Audible indication – Ultrasonic pest control
Patent
1992-04-09
1993-11-30
Crosland, Donnie L.
Communications: electrical
Audible indication
Ultrasonic pest control
340568, 340571, 340692, 40455, G08B 300, G08B 2508
Patent
active
052669203
ABSTRACT:
A magnet for posting notes or the like on a refrigerator wall or similar metal surface in which the magnet, in one exemplary embodiment, has a battery-operated sound-emitting device which, for added play value, is activated to produce its sound, but only when the magnet is manually removed from its support surface and otherwise, as when it is held by magnetic attraction against a support surface, a disabling switch is held open to correspondingly deactivate the sound-playing mode of the magnet.
REFERENCES:
patent: 3579222 (1971-05-01), Freeman
patent: 3798806 (1974-03-01), Sanford
patent: 3815117 (1974-06-01), Gopperton
patent: 4274088 (1981-06-01), Pierson et al.
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