Patents by Inventor Elwin E. Peirce

Elwin E. Peirce 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).

  • Ventilator section
    Patent number: D258985
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: April 21, 1981
    Inventors: Elwin E. Peirce, Arthur L. Waltz
  • Ventilator section
    Patent number: D259736
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: June 30, 1981
    Inventors: Elwin E. Peirce, Arthur L. Waltz
  • Ventilator section
    Patent number: D260117
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: August 4, 1981
    Inventors: Elwin E. Peirce, Arthur L. Waltz
  • Ventilator
    Patent number: D269293
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: June 7, 1983
    Inventors: Elwin E. Peirce, Arthur L. Waltz
  • Ventilator
    Patent number: D269700
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: July 12, 1983
    Inventors: Elwin E. Peirce, Arthur L. Waltz
  • Base of a roof vent
    Patent number: D277026
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: January 1, 1985
    Inventors: Arthur L. Waltz, Elwin E. Peirce
  • Roof vent
    Patent number: D277027
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: January 1, 1985
    Inventors: Arthur L. Waltz, Elwin E. Peirce
  • Cap for a roof vent
    Patent number: D277028
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: January 1, 1985
    Inventors: Arthur L. Waltz, Elwin E. Peirce