Patents by Inventor Stephen L. Kay

Stephen L. Kay 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).

  • State transfer with throw-away thread
    Patent number: 6418540
    Abstract: A computer system comprises an active processor and one or more spare processors. A dummy thread is created on the active processor while the active processor is running a current thread, causing the current thread to become dormant. The operating system of the active processor saves a set of internal state information for the current thread into a first memory coupled to the active processor. Each write to the first memory is duplicated in an equivalent spare memory coupled to each of the one or more spare processors. The dummy thread then activates the spare processor and de-activates the active processor.
    Type: Grant
    Filed: August 27, 1999
    Date of Patent: July 9, 2002
    Assignee: Lucent Technologies Inc.
    Inventors: Peter Allen Dempsey, Daniel John Goudzwaard, Salvatore John Iaccarino, Stephen L. Kay, Andrew Bennett Struble, Davinderjit Singh Kohli
  • Quiet key switch
    Patent number: 4859820
    Abstract: A key switch utilizing a buckling compression spring to move a switch actuator mechanism includes a cylindrical core of resilient material located within an opening formed by the coils of the compression spring to attenuate the acoustical energy generated by the buckling and unbuckling action of the spring.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: August 22, 1989
    Assignees: American Telephone and Telegraph Company, AT&T Information Systems Inc.
    Inventors: Casimer Gotfryd, Stephen L. Kay, Hartland P. Klotz, Robert M. Wentzel