Patents by Inventor William A. Bleher

William A. Bleher 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).

  • Self-clocking NRZ recording and reproduction system
    Patent number: 3947878
    Abstract: A magnetic recording and reading system wherein data is written into a magnetic medium in an NRZ code which is interrupted for the insertion of a guaranteed flux transition after each series of eight data cells. On readout, the guaranteed sync transition is used to generate a read clock for strobing purposes. The read clock is compensated to account for physical migration of the sync transition in the medium due to crowding effects or interaction with adjacent flux transitions.
    Type: Grant
    Filed: August 9, 1974
    Date of Patent: March 30, 1976
    Assignee: General Instrument Corporation
    Inventors: Ronald P. McGrath, William A. Bleher