Wyoming Inventors Database
Wyoming Inventors : Name Search Results

Robert Engstrom has a total of 2 patent(s) in the database.

* Some patents in this database have one or more inventors, not all of whom may be from Wyoming.

 

  1. Patent Number: 5735360     View patent at USPTO
    Title: MINING BIT
    Assignee: None
    Issue Date: April 07, 1998
    Inventor(s): Robert W. Engstrom, Gillette, WY

  2. Patent Number: 7882907     View patent at USPTO
    Title: EARTH BORING BIT
    Assignee: None
    Issue Date: February 8, 2011
    Inventor(s): Robert W. Engstrom, Gillette, WY