Patents by Inventor Allen McDowell

Allen McDowell 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).

  • Interleaved synch and beginning of data indicators
    Patent number: 4081844
    Abstract: Each data record portion on a record member includes preamble signals for synchronizing recording apparatus with respect to data signals recorded in juxtaposition to the preamble signals. A plurality of beginning of data indicators are interleaved in the synchronizing signals for providing a plurality of independent but coacting beginning of data location pointers. Enhanced apparatus includes means responsive to any one of the location pointers to ensure a reliable start of data indication.
    Type: Grant
    Filed: August 2, 1976
    Date of Patent: March 28, 1978
    Assignee: International Business Machines Corporation
    Inventors: Ernest William Devore, Judson Allen McDowell