Device for detecting and signalling the presence of objects in a

Details Device for detecting and signalling the presence of objects in a Device for detecting and signalling the presence of objects in a

1993-10-29

1995-01-03

Milano, Michael J.

Deposit and collection receptacles

Letter boxes

Signals

340569, B65D 9100

Patent

active

053779061

ABSTRACT:
A device for detecting and signalling the presence of an object in a closed container, comprising:

REFERENCES:
patent: 2835887 (1958-05-01), Seeley et al.
patent: 2968804 (1961-01-01), Buffington
patent: 4314102 (1982-02-01), Lowe et al.
patent: 4633236 (1986-12-01), Buhl
patent: 4794377 (1988-12-01), Benages
patent: 4868543 (1989-09-01), Binkley
patent: 4999612 (1991-03-01), Cherveny
patent: 5036310 (1991-07-01), Russell

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