Patents by Inventor John D. Hohol

John D. Hohol 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).

  • Finned sleeve for driven type survey monuments
    Patent number: 5148641
    Abstract: A sleeve is provided for a driven-type survey monument having a penetrating point and cylindrical rod sections to stabilize the monument in the ground. The sleeve has an elongated body having a hollow bore, which receives a first portion of the survey monument, and a plurality of fins formed integrally with and extending outwardly from the elongated body of the sleeve.
    Type: Grant
    Filed: June 21, 1991
    Date of Patent: September 22, 1992
    Assignee: Berntsen International, Inc.
    Inventors: William C. Rushing, John D. Hohol