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:
Jan. 11, 1977
Filed:
Aug. 04, 1975
Michael I Rackman, Brooklyn, NY (US);
Other;
Abstract
There is disclosed a two-way cable system in which the deliberate introduction of continuous upstream message interference at any subscriber terminal does not destroy the efficacy of the system. Each subscriber terminal is coupled through an interface unit to the cable, and the interface unit permits upstream transmission of a message from the respective terminal only following recognition by the interface unit of the downstream transmission of the address of the respective terminal. Because the interface units are located off the premises of the subscribers, a deliberately introduced interference signal on a subscriber line cannot reach the cable except during the respective time slot of the subscriber.