Wyoming Inventors Database
Wyoming Inventors : Name Search Results

Earl Campbell 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: 1534916     View patent at USPTO
    Title: COUPLING
    Assignee: Harper Lamar Jarvis
    Issue Date: April 21, 1925
    Note: Assignee held one-half
    Inventor(s): Earl Edgar Campbell, Gillette, WY

  2. Patent Number: 1666000     View patent at USPTO
    Title: WELL-CLEANING DEVICE
    Assignee: None
    Issue Date: April 10, 1928
    Inventor(s): Earl Edgar Campbell, Gillette, WY