Wallet capable of preventing loss of cards kept therein

Details Wallet capable of preventing loss of cards kept therein Wallet capable of preventing loss of cards kept therein

1998-06-26

1999-06-22

Mullen, Thomas

Communications: electrical

Condition responsive indicating system

Specific condition

340600, G08B 1314

Patent

active

059146575

ABSTRACT:
A wallet having a plurality of card slots for holding the credit cards, the charge cards, etc. The card slots are provided with a sensing circuit, an IC circuit board connected in series with a buzzer and a photo sensor. The buzzer is not activated when a card is removed from one of the card slots. The buzzer is activated when the card is not returned to the card slot and when the wallet remains unfolded such that the photo sensor is exposed to light.

REFERENCES:
patent: 4692745 (1987-09-01), Simanowitz
patent: 4719453 (1988-01-01), Beck et al.
patent: 4890094 (1989-12-01), Kopel
patent: 4916434 (1990-04-01), McNeely

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