Patents by Inventor John E. Simpson

John E. Simpson 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).

  • Copyholder
    Patent number: D302569
    Type: Grant
    Filed: September 8, 1986
    Date of Patent: August 1, 1989
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Eugene V. Albright, Arthur D. Ellis, John E. Simpson