Patents by Inventor Edwin Spoelsra

Edwin Spoelsra 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).

  • TUNNELING APPARATUS
    Publication number: 20140219725
    Abstract: A tunneling apparatus includes a drill head and a steering shell. The drill head includes a main body having a distal end and an oppositely disposed proximal end. The steering shell is disposed at the distal end of the drill head and is moveable relative to the main body of the drill head. The drill head includes structure that assists in maintaining a precise line even in soft drilling conditions.
    Type: Application
    Filed: May 31, 2012
    Publication date: August 7, 2014
    Applicant: Vermeer Manufacturing Company
    Inventors: Stuart Harrison, Edwin Spoelsra, Nathan James Meyer