Patents by Inventor Jon A. Merkel

Jon A. Merkel 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: 4185425
    Abstract: A new surveyor's monument characterized by its permanent connection with the ground, including an elongated metal stake and a plastic form monument permanently affixed on the upper portion of the stake. The monument member includes a hollow tube with a locking means at the upper end thereof and fixedly attached to said upper end by a plastic cap. The hollow tube is permanently embedded in the said plastic monument, said tube and locking means engaging the upper end of the stake.
    Type: Grant
    Filed: September 5, 1978
    Date of Patent: January 29, 1980
    Inventor: Jon A. Merkel