Patents by Inventor Albert Bertoti

Albert Bertoti 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).

  • Patent number: 5101571
    Abstract: A vertical-difference measuring instrument comprising an entirely closed liquid system containing, as the only fluid, only substantially noncompressive liquid, the liquid system comprising a variable-volume reference reservoir and a sensing reservoir interconnected by a flexible hose, a flexible-walled gas container in the sensing reservoir and a pressure gauge connected in fluid communication with the flexible-walled gas container in the sensing reservoir for giving indication of the vertical distance between the reference reservoir and the sensing reservoir is disclosed.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: April 7, 1992
    Inventor: Albert Bertoti