Patents by Inventor John D. Grinstead

John D. Grinstead 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).

  • Component and method for restoring a stairway
    Patent number: 7073297
    Abstract: A fiberglass molded stairway component and method of using the component enables an old stairway to be removed and replaced by a new stairway while making reuse of the existing stringers and using new stair supports or stair supports previously used with the stairway being replaced.
    Type: Grant
    Filed: May 17, 2005
    Date of Patent: July 11, 2006
    Assignee: J. D. Grinstead General Construction Company, Inc.
    Inventor: John D. Grinstead
  • Component and method for restoring a stairway
    Patent number: 6895717
    Abstract: A fiberglass molded stairway component and method of using the component enables an old stairway to be removed and replaced by a new stairway while making reuse of the stringers and using new stair supports or stair supports previously used with the stairway being replaced.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: May 24, 2005
    Assignee: J.D. Grinstead General Construction Company, Inc.
    Inventor: John D. Grinstead