Patents by Inventor John H. Ehlert

John H. Ehlert 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).

  • Actuator with back pressure valve
    Patent number: 9915357
    Abstract: An actuator device for a pressurized container incorporating an internal back flow prevention valve. The actuator may include a ball and socket check valve with a resilient component to maintain the ball in a condition to operate as a check valve even when upside-down.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: March 13, 2018
    Assignee: TSI Products, Inc.
    Inventor: John H. Ehlert
  • Basket for ski pole
    Patent number: D315591
    Type: Grant
    Filed: June 27, 1988
    Date of Patent: March 19, 1991
    Inventor: John H. Ehlert
  • Ski pole basket
    Patent number: D316132
    Type: Grant
    Filed: June 27, 1988
    Date of Patent: April 9, 1991
    Inventor: John H. Ehlert
  • Heater housing
    Patent number: D717415
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: November 11, 2014
    Assignee: TSI Products, Inc.
    Inventors: John H. Ehlert, Stephen William O'Brien
  • Heater housing
    Patent number: D717931
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: November 18, 2014
    Assignee: TSI Products, Inc.
    Inventors: John H. Ehlert, Stephen William O'Brien
  • Air vent housing
    Patent number: D744631
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: December 1, 2015
    Assignee: TSI Products, Inc.
    Inventors: John H. Ehlert, Stephen William O'Brien
  • Air vent housing
    Patent number: D744632
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: December 1, 2015
    Assignee: TSI Products, Inc.
    Inventors: John H. Ehlert, Stephen William O'Brien