Patents by Inventor David R. Stempin

David R. Stempin 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).

  • Tank stabilizer
    Patent number: 4907712
    Abstract: A stabilizer for a small gas cylinder consisting of a plastic cone which fits over the lower end of the cylinder and firmly grips the cylinder wall and provides an extended base which stabilizes the cylinder in its upright position.
    Type: Grant
    Filed: June 28, 1989
    Date of Patent: March 13, 1990
    Inventor: David R. Stempin