Patents by Inventor William R. Revels

William R. Revels has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Track-following servo for disk drive with multiple reference windows and time dependent logic circuitry
    Patent number: 4839751
    Abstract: Disclosed is a Fine positioning arrangement for track-follow servo means in a disk drive arrangement wherein servo head output is processed logically to indicate violation by the head of a near-boundry or a far-boundry for prescribed times to indicate whether the transducer is truly "on-center" or not and to logically exclude noise and other error conditions that might compromise this indication.
    Type: Grant
    Filed: March 10, 1987
    Date of Patent: June 13, 1989
    Assignee: Unisys Corporation
    Inventor: William R. Revels