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:
May. 11, 2010
Filed:
Jul. 24, 2000
Hillel Weinstein, Haifa, IL;
Zeev Orbach, Ashkelon, IL;
Hillel Weinstein, Haifa, IL;
Zeev Orbach, Ashkelon, IL;
Xtend Networks Ltd., Airport, IL;
Abstract
A television multiplexing and transmission system and method, which is using certain portions of the standard television channel-bandwidth to superimpose additional information by phase-modulating said information using precisely-derived frequency carriers combined with reference frequencies and injecting said phase modulated electronic signals at amplitudes below the standard minimum detectable signal without affecting the simultaneous orderly operation of the same standard television channels into which the additional information is multiplexed, which system may be used to simultaneously transmit to a plurality of users various data in response to their corresponding queries, with particular applications to CATV systems, comprising a user data unit, a multiplexing and transmission unit and a alternate frequency unit.