Patents by Inventor David Henry Buchanan

David Henry Buchanan 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).

  • Bolt identification system
    Patent number: 3988959
    Abstract: A means for providing an indication of the length of the bolt member of an anchor bolt assembly of the type including a bolt member and an expandable sleeve member. The end of the bolt member opposite the sleeve expanding portion thereof is provided with a recess, the depth of which is reversely proportional of the length of the bolt member.
    Type: Grant
    Filed: March 11, 1974
    Date of Patent: November 2, 1976
    Assignee: Olin Corporation
    Inventor: David Henry Buchanan