Patents by Inventor John A. Roser

John A. Roser 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).

  • Liquid level sender
    Patent number: D378284
    Type: Grant
    Filed: June 30, 1995
    Date of Patent: March 4, 1997
    Assignee: Datcon Instrument Co., Inc.
    Inventors: Henry G. Grilk, David P. Riegel, John A. Roser