Patents by Inventor Stanley N. Johnson

Stanley N. Johnson 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).

  • Rock cutting tip inserts
    Patent number: 4194790
    Abstract: The rock cutting tip insert of a rock cutting tool comprises two layers, the front layer being harder than the backing or base layer by at least one hundred units on the Vickers Hardness scale.
    Type: Grant
    Filed: April 2, 1975
    Date of Patent: March 25, 1980
    Assignee: Coal Industry (Patents) Ltd.
    Inventors: Peter Kenny, Stanley N. Johnson
  • Inflatable shelter
    Patent number: D363993
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: November 7, 1995
    Inventors: Stanley N. Johnson, Gerald J. Smith