Patents by Inventor Douglas C. Albrecht

Douglas C. Albrecht 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).

  • Handboards
    Patent number: 4932911
    Abstract: A handboard having a convex top, a flat base and a flat extended lip in which the convex top supports the user's hand in its natural partially cupped position during use, the flat base presents minimal forward resistance in use and the flat extended lip increases a swimmer's pulling area on a downstroke.
    Type: Grant
    Filed: July 21, 1989
    Date of Patent: June 12, 1990
    Inventor: Douglas C. Albrecht
  • Pair of handboards
    Patent number: D321547
    Type: Grant
    Filed: May 19, 1989
    Date of Patent: November 12, 1991
    Inventor: Douglas C. Albrecht