Patents by Inventor Douglas W. Mehrens

Douglas W. Mehrens 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).

  • Slidably repositionable hat
    Patent number: 5533211
    Abstract: A hat having an attached accessory such as a visor is disclosed incorporating a headband formed integrally with a sliding member positioned adjacent the opening in the crown. A track is secured to the crown and slidingly engages the sliding member to permit the crown and attached visor to be rotated relative to the wearer's head without removing the hat.
    Type: Grant
    Filed: June 2, 1994
    Date of Patent: July 9, 1996
    Inventor: Douglas W. Mehrens
  • Window sill flower pot support
    Patent number: 4475306
    Abstract: A flower pot support for securing to a narrow window sill, which support extends outwardly of the sill in a cantilever manner, and employs a weight transfer leg which engages at its free end the wall of the building below the sill.
    Type: Grant
    Filed: November 22, 1982
    Date of Patent: October 9, 1984
    Inventor: Douglas W. Mehrens
  • Pump and filter assembly for evaporative coolers
    Patent number: 4424007
    Abstract: An improved pump and filter assembly for application in evaporative coolers comprising a molded plastic housing enclosing a pump and providing support for a replaceable cylindrical filter that protects the pump against contamination by air and waterborne particles, thereby assuring longer pump life and more reliable service.
    Type: Grant
    Filed: October 16, 1981
    Date of Patent: January 3, 1984
    Inventors: Douglas W. Mehrens, James F. Kuchar
  • Filter assembly for evaporative cooler pumps
    Patent number: 4353846
    Abstract: An improved water filter assembly for use with an evaporative cooler pump, the filter comprising a cylindrical filter wall, a closed base and a neoprene curtain that covers the top but opens to receive the pump impeller.
    Type: Grant
    Filed: November 16, 1981
    Date of Patent: October 12, 1982
    Inventors: Douglas W. Mehrens, James F. Kuchar