Security Link from Ameritech

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Records under this name other than patents Security Link from Ameritech holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.

Showing 1 to 8 of 8 · Back to Security Link from Ameritech

Patent	Title	Status	Expires	Confidence
US 4,255,669	Sensing apparatus Term ended Term ended no later than Mar 10, 2001 · Low confidence	Term ended	Term ended no later than Mar 10, 2001	Low confidence
US 4,273,960	Apparatus for monitoring usage of a telephone Term ended Term ended no later than Jun 16, 2001 · Low confidence	Term ended	Term ended no later than Jun 16, 2001	Low confidence
US 4,284,849	Monitoring and signalling system Term ended Term ended no later than Aug 18, 2001 · Low confidence	Term ended	Term ended no later than Aug 18, 2001	Low confidence
US 4,286,331	Monitoring and signalling system including apparatus for processing and analyzing signals produced by activity monitoring sensors Term ended Term ended no later than Aug 25, 2001 · Low confidence	Term ended	Term ended no later than Aug 25, 2001	Low confidence
US 4,303,801	Apparatus for monitoring and signalling system Term ended Term ended no later than Dec 1, 2001 · Low confidence	Term ended	Term ended no later than Dec 1, 2001	Low confidence
US 4,454,502	Apparatus for monitoring and signalling system Formerly held Term ended Term ended no later than Jun 12, 2004 · Low confidence	Term ended	Term ended no later than Jun 12, 2004	Low confidence
US D258,577	Signalling device Term ended	Term ended
US D262,964	Housing for an automatic telephone alarm system Term ended	Term ended