Patents by Inventor Ronald E. Hester

Ronald E. Hester 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).

  • Color correction head
    Patent number: 4653902
    Abstract: In a photographic color correction head filters are movable across a light path by DC motors. The motors drive cams via high reduction gearboxes and the filters are carried on supports urged against the cams by springs. The filters remain in their selected position when the motors are switched off due to internal friction in the gearboxes.
    Type: Grant
    Filed: February 20, 1986
    Date of Patent: March 31, 1987
    Assignee: Maxiprint Systems Limited
    Inventor: Ronald E. Hester