Wyoming Inventors Database
Wyoming Inventors : Name Search Results

Evan Griffith has a total of 1 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: 1397864     View patent at USPTO
    Title: SAFETY-KEY FOR DRILLING-RIGS
    Assignee: None
    Issue Date: November 22, 1921
    Inventor(s): Evan J. Griffith, Riverton, WY