Exclusive license is offered under U.S. patent 6,281,803, titled Control Mat Monitoring and Warning Apparatus and Method.

The invention provides continuous monitoring of the electrical performance characteristics of a control (or switch) mat to which it is attached, while the mat remains in normal routine use. The device provides early warning of deterioration of the electrical characteristics of the mat so that, in the event of deterioration, the mat can be removed from service and replaced in a timely manner.

The device also compensates for deterioration of the electrical performance characteristics of the control mat so that a proper and appropriate presence detection signal can continue to be generated, by the device, significantly beyond the point that the mat would otherwise be capable of proper operation of the door, or other function.

The purpose of the device is to enhance public and industrial safety by greatly reducing the possibility of an accident arising from unsuspected control mat functional deterioration. In the automatic pedestrian door industry, the device also serves to augment the Daily Safety Check and the Control Mat Sensitivity Test specified by the ANSI (American National Standards Institute) A156.10 national standard for power operated pedestrian doors.

If you are interested in obtaining an exclusive license to manufacture and sell within the United States of America devices covered by U.S. patent 6,281,803, please send e-mail to Davis Associates, Inc. expressing your interest. Or, you can call us at 617-244-1450 or FAX us at 617-964-4917.