Patents by Inventor Robert B. Bonfield

Robert B. Bonfield 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).

  • Patent number: 3985389
    Abstract: Elevating means for use with a wheelchair said means being adapted to be secured to the side frames of the wheelchair and having hydraulically actuated lifting means which when operated extend downwardly to engage the ground and lift the side frames of the chair upwardly.
    Type: Grant
    Filed: June 23, 1975
    Date of Patent: October 12, 1976
    Assignee: Bardic Engineering Limited
    Inventor: Robert B. Bonfield