Patents by Inventor Roger Duvall

Roger Duvall 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).

  • SCSI port filter driver for enhanced audio data
    Patent number: 6393517
    Abstract: A method of recording data, including audio data and control data, to a SCSI drive having both a write mode and a write-verify mode, comprises the steps of initializing the drive to a write mode, receiving recording data and organizing the recording data into SCSI request blocks (SRBs), and checking each SRB to see if it contains a write block. If the SRB includes either no write block or is audio data, then the SRB is recorded by the drive. However, if the SRB includes a write block and no audio data, then the SRB is converted from a write block to a write-verify block and recorded by the drive.
    Type: Grant
    Filed: August 31, 1999
    Date of Patent: May 21, 2002
    Assignees: Sony Corporation, Sony Electronics Inc.
    Inventors: Richard J. Oliver, Jeff Claar, Roger Duvall