Patents by Inventor Mark W. John

Mark W. John 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).

  • Vertical blind retraction apparatus with spacing control
    Patent number: 6073672
    Abstract: Trucks carried on a window track and mounting grippers operative to grip a retraction chord operative to when the trucks are deployed in a spaced relation, grip a retraction chord to be carried rearwardly toward the parked position when the chord is retracted. The grippers are operative upon the trucks reaching a parked position to release the chord for continued retraction of the chord relative to the parked truck so that continued retraction will draw the remaining trucks to parked position.
    Type: Grant
    Filed: June 10, 1996
    Date of Patent: June 13, 2000
    Inventor: Mark W. John
  • Vertical blind retraction apparatus with spacing control
    Patent number: 5524692
    Abstract: Trucks carried on a window track and mounting grippers operative to grip a retraction cord operative to when the tracks are deployed in a spaced relation, grip a retraction cord to be carried rearwardly toward the parked position when the cord is retracted. The grippers are operative upon the tracks reaching a parked position to release the cord for continued retraction of the cord relative to the parked truck so that continued retraction will draw the remaining tracks to parked position.
    Type: Grant
    Filed: March 7, 1994
    Date of Patent: June 11, 1996
    Assignee: Back Tracker, Inc.
    Inventor: Mark W. John