Patents by Inventor Frank D. Sears

Frank D. Sears 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).

  • Plastic ball valve stem seal
    Patent number: 5232201
    Abstract: A plastic ball valve having improved valve stem sealing means.
    Type: Grant
    Filed: January 7, 1992
    Date of Patent: August 3, 1993
    Assignee: M&FC Holding Company, Inc.
    Inventors: Ricky E. Spears, Frank D. Sears, Stephen M. Horvath
  • Method for assembling a plastic ball valve
    Patent number: 5169124
    Abstract: A method for assembling a plastic ball valve having improved sealing means.
    Type: Grant
    Filed: May 6, 1992
    Date of Patent: December 8, 1992
    Assignee: M&FC Holding Company, Inc.
    Inventors: Ricky E. Spears, Frank D. Sears, Stephen M. Horvath
  • Plastic ball valve ball seal means
    Patent number: 5165658
    Abstract: A plastic ball valve having improved ball sealing means.
    Type: Grant
    Filed: May 6, 1992
    Date of Patent: November 24, 1992
    Assignee: M&FC Holding Company, Inc.
    Inventors: Ricky E. Spears, Frank D. Sears, Stephen M. Horvath