Patents by Inventor by Diane Haviland, administratrix

by Diane Haviland, administratrix 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).

  • Systems and apparatus for control of fueled heat generators
    Patent number: 4049193
    Abstract: Apparatus for use in controlling the firing of heat generators provides output signals having first or second different characteristics during preselected time periods, the times of occurrence and extents of which are readily changeable by variation of the settings of switches. A system includes night and day thermostats selectively connected with a heat generator under control of such apparatus.
    Type: Grant
    Filed: August 4, 1975
    Date of Patent: September 20, 1977
    Assignee: Fuel Computer Corporation
    Inventors: Herbert Haviland, deceased, by Diane Haviland, administratrix, Arthur Smith, Charles Boyer