Patents by Inventor Robert E. Dunlap

Robert E. Dunlap 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).

  • Feedback control circuit for photosensors in magnetic tape drives
    Patent number: 4410148
    Abstract: A magnetic tape recording and reproducing system in which a light reflective marker is on each reel of tape and has a feedback circuit connected between the light sensor and the source of light for controlling the intensity of the source to maintain the output substantially constant, notwithstanding changes of reflectivity of the tape or gradual changes of efficiency of the source of light. The feedback circuit provides improved detection of the passage of the reflective marker past the sensor.
    Type: Grant
    Filed: May 26, 1981
    Date of Patent: October 18, 1983
    Assignee: Storage Technology Corporation
    Inventor: Robert E. Dunlap