Key locking indicator

Details Key locking indicator Key locking indicator

1993-06-28

1995-07-25

Cuomo, Peter M.

Locks

Operating mechanism

Key

40330, 70432, 70395, 70438, E05B 4100

Patent

active

054351600

ABSTRACT:
A key locking indicator device usable with a key of conventional design for tactile and visual indication of whether the device was last used to look or unlock the look operated by the key. The device is of simple construction, embodies a minimum number of moving parts, and is easy to use.

REFERENCES:
patent: 1843335 (1932-02-01), Oberfield
patent: 2083859 (1937-06-01), North
patent: 2373893 (1945-04-01), Hoenger
patent: 4403487 (1983-09-01), Marty
patent: 4432218 (1984-02-01), Hoener
patent: 4440011 (1984-04-01), Klein
patent: 4631943 (1986-12-01), Hoener
patent: 4936896 (1990-06-01), Takatsuka

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