Patents by Inventor Stephen K. Henry

Stephen K. Henry 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).

  • Wheel chock
    Patent number: 4917219
    Abstract: A light-weight wheel chock is formed having a thin exterior shell of rigid, chemically-inert plastic material, such as high-density polyethylene, and an interior cavity filled with light-weight rigid or semi-rigid foam, such as high-density polyurethane foam.
    Type: Grant
    Filed: November 26, 1985
    Date of Patent: April 17, 1990
    Inventor: Stephen K. Henry
  • Wheel chock
    Patent number: D316243
    Type: Grant
    Filed: July 26, 1988
    Date of Patent: April 16, 1991
    Inventor: Stephen K. Henry
  • Cleat for a wheel chock
    Patent number: D397986
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: September 8, 1998
    Inventor: Stephen K. Henry
  • Wheel chock
    Patent number: D402616
    Type: Grant
    Filed: February 13, 1997
    Date of Patent: December 15, 1998
    Inventor: Stephen K. Henry
  • Wheel chock
    Patent number: D404001
    Type: Grant
    Filed: February 13, 1997
    Date of Patent: January 12, 1999
    Inventor: Stephen K. Henry
  • Wheel chock
    Patent number: D407059
    Type: Grant
    Filed: August 17, 1998
    Date of Patent: March 23, 1999
    Inventor: Stephen K. Henry
  • Wheel chock
    Patent number: D409133
    Type: Grant
    Filed: February 13, 1997
    Date of Patent: May 4, 1999
    Inventor: Stephen K. Henry
  • Wheel chock
    Patent number: D409554
    Type: Grant
    Filed: August 17, 1998
    Date of Patent: May 11, 1999
    Inventor: Stephen K. Henry