The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 12, 1985
Filed:
May. 03, 1982
Michael A Leveille, Newton, NH (US);
Charles F Walker, Derry, NH (US);
AT&T Bell Laboratories, Murray Hill, NJ (US);
Abstract
Bidirectional communications between an alarm loop, comprising one or more alarm transmitters, and a remote receiver is provided through a digital transmission facility by a pair of interface units (201,301). Each interface unit, disposed at an end of the digital transmission facilities, provides encoding and decoding of signals to and from the alarm receiver. For greater reliability, each interface unit (601,701) can be adapted to select signals received from different digital transmission facilities.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile