Patents by Inventor Melvin D. Martin

Melvin D. Martin 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).

  • Method for making sleeve encased concrete posts
    Patent number: 5229051
    Abstract: A process for producing a concrete post having a sleeve that functions as a pouring form during pouring of the posts, a protective shield during shipping and storage thereof, and a strengthening component upon installation. The post is produced in a process whereby multiple, replacable sleeves are provided in a rack which are simultaneously filled from a hopper. The sleeve cavities are substantially free of rebar to facilitate pouring and reduce cost, the sleeve replacing the rebar as the strengthening component.
    Type: Grant
    Filed: June 27, 1991
    Date of Patent: July 20, 1993
    Assignee: Perma-Post International, Inc.
    Inventor: Melvin D. Martin