Patents by Inventor Knud Peter Nielsen, deceased

Knud Peter Nielsen, deceased 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).

  • Oil sampler
    Patent number: D402219
    Type: Grant
    Filed: October 21, 1997
    Date of Patent: December 8, 1998
    Assignee: Quantech Instruments Inc.
    Inventors: C. Bruce Hewson, Knud Peter Nielsen, deceased