Patents by Inventor Ray Y. Yokoyama

Ray Y. Yokoyama 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).

  • Loop-back circuit for testing a magnetic recording system with simultaneous read and write functions
    Patent number: 5479098
    Abstract: In a magnetic recording system, a loop-back test circuit provides a technique to test a magnetic recording head, a read circuit, and a write circuit to a read-write head, is sensed through the voltage generated at the head by the test current, such that a small voltage portion of the test signal is transferred through a resistor toga read circuit. The voltage portion is then filtered through a capacitor to form detectable peaks such that the read signal is generated with pulses corresponding to the peaks.
    Type: Grant
    Filed: March 15, 1993
    Date of Patent: December 26, 1995
    Assignee: Trace Mountain Products, Inc.
    Inventors: Ray Y. Yokoyama, Gerald L. Pressman
  • Flexible disk drive
    Patent number: D249346
    Type: Grant
    Filed: October 19, 1976
    Date of Patent: September 12, 1978
    Assignee: Shugart Associates
    Inventors: Albert S. Chou, David A. Brown, Donald V. Daniels, Harold C. Medley, Peter A. Ronzani, Ray Y. Yokoyama