Patents by Inventor Harold C. Diffenderfer

Harold C. Diffenderfer 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).

  • Patent number: 4004386
    Abstract: A concrete and liner retainer coping for a pool and the like comprising an upper vertical wall having a top arcuate curved portion curving rearwardly in a direction away from the pool and formed with a vertically downwardly depending lip ending in a free edge thereof. A horizontal part extends rearwardly relative to the vertical wall and has at its free rear end an upwardly directed vertically oriented back lip. A connection portion integrally connects the horizontal portion to the vertical portion, and a lower vertical edge is joined to a front end of the horizontal part, the latter in cooperation with the connecting portion forming a mouth adapted to receive therein the liner.
    Type: Grant
    Filed: September 8, 1975
    Date of Patent: January 25, 1977
    Inventor: Harold C. Diffenderfer