Detector Systems, Inc.

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Records under this name other than patents Detector Systems, Inc. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.

Showing 1 to 7 of 7 · Back to Detector Systems, Inc.

Patent	Title	Status	Expires	Confidence
US 4,293,841	Pedestrian traffic control system Formerly held Term ended Term ended no later than Oct 6, 2001 · Low confidence	Term ended	Term ended no later than Oct 6, 2001	Low confidence
US 4,731,867	Vehicle communication system using existing roadway loops Formerly held Term ended Term ended no later than Mar 15, 2008 · Low confidence	Term ended	Term ended no later than Mar 15, 2008	Low confidence
US 4,996,716	Vehicle communication system using existing roadway loops Formerly held Term ended Term ended no later than Feb 26, 2011 · Low confidence	Term ended	Term ended no later than Feb 26, 2011	Low confidence
US 5,028,921	Vehicle detector method and system Formerly held Term ended Term ended no later than Jul 2, 2011 · Low confidence	Term ended	Term ended no later than Jul 2, 2011	Low confidence
US 5,089,815	Vehicle communication system using existing roadway loops Formerly held Term ended Term ended no later than Feb 18, 2012 · Low confidence	Term ended	Term ended no later than Feb 18, 2012	Low confidence
US 5,198,811	Vehicle communication system using existing roadway loops wherein the physical integrity of the loop is kept intact Formerly held Term ended Term ended no later than Mar 30, 2013 · Low confidence	Term ended	Term ended no later than Mar 30, 2013	Low confidence
US 5,247,297	Vehicle detector method for multiple vehicle counting Formerly held Term ended Term ended no later than Sep 21, 2013 · Low confidence	Term ended	Term ended no later than Sep 21, 2013	Low confidence