Patents by Inventor Carol Chihara

Carol Chihara 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).

  • Deferred parity checking of control signals across a bidirectional data transmission interface
    Patent number: 4823347
    Abstract: Control signal reliability across an I/O limited, high-speed data transmission interface is assured by time-sequenced transmission of control signals and parity signals. Two sets of control signals are transferred in opposing directions across the data transmission interface in a first data transfer period, during which their joint parity is determined and latched on each side of the interface, and the result of one latched joint parity determination is transmitted across the interface. During the following data transfer period, the transmitted parity is compared with the other joint parity determination, the results of the comparison being used to detect transmission errors in the control signals.
    Type: Grant
    Filed: May 18, 1987
    Date of Patent: April 18, 1989
    Assignee: International Business Machines Corporation
    Inventors: Victor H. Chin, Carol Chihara, Allen S. Sha