Patents by Inventor Joseph A. Harper

Joseph A. Harper 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).

  • Pressure relief nipple for RV hook-up
    Patent number: 6352086
    Abstract: A pressure relief device is placed in line with a water supply hose for a recreational vehicle to facilitate bleeding off back pressure when disconnecting the hose from a water hook-up. The device has a tubular nipple with a needle-valve assembly affixed onto it about midway between threaded fittings on the ends of the nipple.
    Type: Grant
    Filed: January 25, 2001
    Date of Patent: March 5, 2002
    Inventor: Joseph A. Harper
  • High chair with magnetic dishes and tray
    Patent number: 6179377
    Abstract: A high chair has a tray that has a steel (ferromagnetic) core or insert layer sandwiched between durable plastic layers, to be used with children's dishware that has permanent magnets in their bases or bottoms. The insert can be a sheet of seven-gauge steel, with perforations to relieve some of the weight of the metal. The bottoms may incorporate two or more coin-shaped permanent magnets.
    Type: Grant
    Filed: July 19, 1999
    Date of Patent: January 30, 2001
    Inventor: Joseph A. Harper
  • Recloseable hot cup lid
    Patent number: D624413
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: September 28, 2010
    Assignee: Letica Corporation
    Inventors: John Robert Selina, Wayne Joseph Harper
  • Motion simulation capsule
    Patent number: D428957
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: August 1, 2000
    Inventor: Stephen Joseph Harper