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:
Jun. 16, 1987
Filed:
May. 31, 1984
David Wreford-Howard, Englewood, CO (US);
American Television & Communications Corporation, Englewood, CO (US);
Abstract
In a cable television system in which the individual subscriber's converter/tuner is located outside the subscriber's premises in an external control unit ('ECU') and controlled remotely via a subscriber processing unit ('SPU') connected to the ECU by a drop cable, data transmitted from the SPU to the ECU (e.g., channel selection data) is verified by transmitting similar echo back data from the ECU to the SPU. The SPU compares the original and echo back data to assure that the ECU correctly received the original data.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile