Patents by Inventor Doug Manarin

Doug Manarin 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).

  • Wheelchair anti-tipping device
    Patent number: 6047979
    Abstract: A wheelchair has a pair of wheels supporting a frame, a pair of front castors, a seat, and an anti-tipping device on the frame. The anti-tipping device includes an extensible and retractable displacement mechanism including an actuating member manually accessible by a person seated on the seat for displacing a ground engagement member between a forwardly retracted inoperative position, in which the ground engagement member is retracted beneath the seat, and a rearwardly extended operative or deployed position, in which the ground engagement member is extended rearwardly from the frame.
    Type: Grant
    Filed: April 3, 1998
    Date of Patent: April 11, 2000
    Assignee: Geer Products Ltd.
    Inventors: Laura Kraft, Emerson Gallagher, Janice Blok, Doug Manarin