Patents by Inventor Ulrich G. Gerber

Ulrich G. Gerber 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).

  • Method and apparatus for encoding and direct overwriting of magneto-optic data
    Patent number: 4872078
    Abstract: Direct overwrite of data on magneto-optic medium is described. Old data is erased and new data is written during a single rotation of the media in a data storage system which includes a resonant coil for producing a high frequency alternating magnetic field interacting with laser pulses having a duration equal to a small fraction of the period of the magnetic field. Variable-length magnetic domains are formed by overlapping circular magnetic domains to provide pulse width modulation (PWM) encoding of data.
    Type: Grant
    Filed: December 9, 1987
    Date of Patent: October 3, 1989
    Assignee: International Business Machines Corporation
    Inventors: Ulrich G. Gerber, Daniel Rugar