Patents by Inventor Robert F. Holmgren

Robert F. Holmgren 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: 5655850
    Abstract: A floating boat lift having 2 side support frames and a front frame with a central region for docking a boat therein with flotation devices attached to the side support frames, flotation devices having sufficient flotation to floatingly suspend the boat lift and a boat carried entirely by the boat lift in a body of water without the aid of lake-bed supports for the boat lift or the boat and a boat lift mechanism carried by the support frames, the boat lift mechanism having U-shaped members with a first side being carried by the first side frame and with a second side carried by the second side frame with a boat lift bar located in a vertically sliding relationship in a first portion of the U-shaped members proximate the first side frame and a second end located in a vertically sliding relationship in another portion of the U-shaped members located proximate the second side dock.
    Type: Grant
    Filed: April 7, 1995
    Date of Patent: August 12, 1997
    Assignee: Armada Group, Inc.
    Inventor: Robert F. Holmgren