Patents by Inventor Michael R. Crews

Michael R. Crews 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).

  • Patent number: 5619661
    Abstract: A dynamic arbitration system for controlling the data transfer between primary and secondary buses in a personal computer has master and target components on both buses. Primary and secondary bus arbiters are included in a bridge circuit, and initially operate independently of one another in a concurrent arbitration mode of operation. This avoids primary bus interruption for secondary-to-secondary transfers and optimizes the primary bus bandwidth. Whenever a secondary-to-primary bus data transfer cycle is detected, the bridge circuit switches the primary and secondary bus arbiters to an interlocked mode of operation. The interlocked arbitration mode of operation is maintained until the next secondary-to-secondary cycle is detected; whereupon the bridge circuit causes the primary and secondary bus arbiters to be switched back to the concurrent arbitration mode of operation.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: April 8, 1997
    Assignee: VLSI Technology, Inc.
    Inventors: Michael R. Crews, Nicholas J. Richardson
  • Patent number: 4101900
    Abstract: A rectangular antenna has a T-bar of planar cross section for providing a axial to cavity transition. A narrow slot having a length equal to one half the wavelength of the upper end point of the frequency range utilized is centered within the T-bar. Tuning stubs are located in predetermined positions directly under the T-bar for reducing the effect of the TE.sub.30 mode.
    Type: Grant
    Filed: February 28, 1977
    Date of Patent: July 18, 1978
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Michael R. Crews, Gary A. Thiele