Memory type tuning system for storing information for a limited number of preferred tuning positions
Patent 4138647 Issued on February 6, 1979. Estimated Expiration Date: 
June 28, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 28, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesAutomatically presetting channel selecting system Radio or television receiver with an automatic station finding arrangement Solid state television channel selection system Sequential channel tuning system with a memory High speed tuning system Patent #: 4070629 InventorAssigneeApplicationNo. 05/810876 filed on 06/28/1977US Classes:455/154.2, Scanning display455/158.2, With electronic digital indication455/166.2, With priority channel selection455/186.1With memory control or programmingExaminersPrimary: Richardson, Robert L.Assistant: Chin, Tommy P. Attorney, Agent or FirmInternational ClassesH03J 5/00 (20060101)H03J 5/02 (20060101) AbstractA memory type tuning system having memory locations for storing information corresponding to a limited number of preferred tuning positions includes apparatus for examining the contents of each of the memory locations when information corresponding to a tuning position is being entered to determine if duplication information corresponding to the same tuning position has already been entered in one of the memory locations. If so, the new information is entered in the memory location containing the duplicate information, rather than in an unused memory location to prevent multiple entries of the same information with the resulting undesirable loss of available memory locations. | |
