Patents by Inventor Earl H. Williams, Jr.

Earl H. Williams, Jr. 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 using semaphores for synchronizing communication between programs or processes resident in a computer system
    Patent number: 5313638
    Abstract: A communication method suitable for use between programs operating at different privilege levels in a processor utilizes shared memory which includes a plurality of memory slots for containing messages to be exchanged and message queue. The synchronization of the programs and access to the shared memory is controlled a number of semaphores. Each slot is provided with its own semaphore ana three additional semaphores are provided to synchronize operation.
    Type: Grant
    Filed: March 24, 1992
    Date of Patent: May 17, 1994
    Assignee: International Business Machines Corp.
    Inventors: David M. Ogle, Earl H. Williams, Jr.