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:
Jan. 12, 1976
Richard G Merrell, Darien, IL (US);
Zenith Radio Corporation, Chicago, IL (US);
Abstract
An all-channel two mode television tuning system includes a counter for sequentially generating channel numbers to adjust tuning. An 82 .times. 1 bit read/write memory is addressed in a program mode by the generated channel numbers to provide locations for storage of signals for tuning to preselected channels. Blanking circuitry responsive to the 60Hz line frequency as a clock source causes repetitive flashing of the channel number indicators until the generated channel number has been stored. In the operate mode channel numbers are again generated to access the memory locations and logic circuitry determines when the generated channel numbers correspond to preselected (stored) channel numbers to provide tuning thereto.