Patents by Inventor Luis Madruga

Luis Madruga 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: 4268906
    Abstract: An I/O controller is provided for transferring data between a host processor and a plurality of I/O devices wherein the host processor generates a transfer command and each of the plurality of I/O devices generates multiple asynchronous service requests for transfer to the host processor. Control circuitry is provided for controlling the transfer of the service requests from the plurality of I/O devices to the host processor. The control circuitry generates a host processor interrupt signal for application to the host processor, such that in response to the host processor interrupt signal, the host processor generates the transfer command to allow the control circuitry to transfer the service requests to the host processor.
    Type: Grant
    Filed: December 22, 1978
    Date of Patent: May 19, 1981
    Assignee: International Business Machines Corporation
    Inventors: Donall G. Bourke, Richard N. Mendelson, Luis Madruga