Patents by Inventor Paul S. Estabrook

Paul S. Estabrook 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).

  • Time sequence monitor
    Patent number: 4290128
    Abstract: Apparatus having a plurality of signal channels, a plurality of stopwatch circuits and a plurality of time lapse displays interconnected so that the relative time lapses in a series of related occurrences can be displayed.
    Type: Grant
    Filed: April 4, 1980
    Date of Patent: September 15, 1981
    Inventor: Paul S. Estabrook
  • Water heater
    Patent number: 3999709
    Abstract: Apparatus and method for providing heat to a hot water storage system in which water from the storage system is circulated through a heat exchanger in the flue of a combustion heat source and circulatory flow is provided by a circulating pump in a secondary circulatory system including a heat exchanger having greater heat transfer capacity than the heat exchanger in the flue so as to dissipate excess heat at a controllable rate.
    Type: Grant
    Filed: May 5, 1975
    Date of Patent: December 28, 1976
    Inventor: Paul S. Estabrook