Patents by Inventor Wilhelm Knickmeyer

Wilhelm Knickmeyer 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 of and apparatus for the investigation of inaccessible subterranean spaces such as boreholes
    Patent number: 4657387
    Abstract: A method of and an apparatus for investigating subterranean boreholes especially in bituminous coal mining. Optical fiber cables carry light for illuminating the hole into the latter and an image of the wall of the borehole from the latter to an evaluating means external of the borehole.
    Type: Grant
    Filed: June 7, 1985
    Date of Patent: April 14, 1987
    Assignee: Bergwerksverband GmbH
    Inventors: Ferdinand Heising, Wilhelm Knickmeyer