Patents by Inventor Robert S. Gilmer

Robert S. Gilmer 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).

  • Ventilation apparatus
    Patent number: 5000081
    Abstract: An apparatus including a ventilation conduit mounted within a ceiling structure of a dwelling, with an exhaust fan and intake fan arranged at ninety degrees relative to one another, with an intake pipe and exhaust pipe arranged contiguously about their major extent relative to one another to effect heat exchange minimizing cold air entering the dwelling.
    Type: Grant
    Filed: April 23, 1990
    Date of Patent: March 19, 1991
    Inventor: Robert S. Gilmer