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:
Apr. 12, 1988
Filed:
Jan. 21, 1987
Warren C DeVilbiss, Noblesville, IN (US);
RCA Corporation, Princeton, NJ (US);
Abstract
A 'cable-ready' receiver includes a controller for selecting broadcast ('air') and cable channels tuned by a tuner. When switching between air and cable tuning modes the controller stores the number of the channel tuned in the previous mode and retunes the tuner to the stored channel if the number is within a range of valid channel numbers for the new tuning mode. If not, the controller increments the number until it is both in the range and present in a user selected channel tuning list and retunes the turner to the incremented number. In another embodiment the controller increments the number until it is within the valid channel range and a video detector signifies that the channel is occupied. Both examples increase the likelihood that an active channel will be tuned when changing the air/cable tuner operating modes.