Patents by Inventor Alan G. W. Dry

Alan G. W. Dry 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).

  • Dry sprinkler system
    Patent number: 5099925
    Abstract: A dry sprinkler system includes a compressed gas pilot operated water valve between a water supply main and a dry sprinkler pipe, the valve being normally open and held closed upon activation of the pilot by water pressure.
    Type: Grant
    Filed: July 5, 1988
    Date of Patent: March 31, 1992
    Inventors: Gary J. Glidden, Alan G. W. Dry