Patents by Inventor Charles J. Hollenbach

Charles J. Hollenbach 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).

  • Earthquake activated valve
    Patent number: 5853019
    Abstract: An earthquake activated valve assembly is attached to a gas line downstream of a gas meter. The valve assembly has a ball check which rolls to a closed position for the valve upon agitation, by for example an earthquake.
    Type: Grant
    Filed: July 8, 1997
    Date of Patent: December 29, 1998
    Inventor: Charles J. Hollenbach