Patents by Inventor Edville A. Kiff

Edville A. Kiff 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 and apparatus for determining the point at which pipe is stuck in a well
    Patent number: 4207765
    Abstract: A method and apparatus for determining the location at which a string of pipe is stuck in a well bore. The apparatus has two relatively movable sections and an electrical sensing device for determining relative movement of the two sections which produces a signal representing the movement. The electrical sensing device has a wiper arm adapted to be displaced with a longitudinal deformation of the pipe string and with angular deformation of the pipe string.
    Type: Grant
    Filed: November 14, 1978
    Date of Patent: June 17, 1980
    Inventor: Edville A. Kiff