Wyoming Inventors Database
Wyoming Inventors : Name Search Results

Frank Johnston 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: 1498381     View patent at USPTO
    Title: AUTOMATIC AIR-BRAKE CONTROL MECHANISM
    Assignee: C. Y. Beard
    Issue Date: June 17, 1924
    Note: Assignee held one-half
    Inventor(s): Frank N. Johnston, Cheyenne, WY

  2. Patent Number: 1534217     View patent at USPTO
    Title: AUTOMATIC AIR-BRAKE-CONTROL MECHANISM
    Assignee: C. Y. Beard
    Issue Date: April 21, 1925
    Note: Assignee held one-half
    Inventor(s): Frank N. Johnston, Cheyenne, WY