Patents by Inventor Frank P. Marker

Frank P. Marker 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).

  • Sailboard provided with foot-retaining loops
    Patent number: 4528924
    Abstract: A sailboard is provided with foot-retaining loops, which are made of flexible and/or elastic material and at their ends are secured to the board. In order to ensure a reliable release also in the case of twisting falls, at least one end of the foot-retaining loops is connected to the sailboard by a snap fastener, which can be opened by tension and/or torsion and/or a transverse displacement.
    Type: Grant
    Filed: June 29, 1982
    Date of Patent: July 16, 1985
    Assignee: Hannes Marker
    Inventors: Hannes Marker, Hans C. Marker, Frank P. Marker
  • Sailboard rig and boom
    Patent number: 4498411
    Abstract: In a sailboard rig, the boom is provided at its mast end with an extension using a torsion spring, which in an operative position extends in the plane of the boom and which is provided at its fore end with an eye for attaching a starting sheet.
    Type: Grant
    Filed: April 28, 1982
    Date of Patent: February 12, 1985
    Assignee: Hannes Marker
    Inventor: Frank P. Marker