Patents by Inventor Franz Siemes

Franz Siemes 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).

  • Roof fan
    Patent number: 3960063
    Abstract: A roof fan having an air-quieting casing or sound reducing device on the suction side. A blower is mounted inside a housing and the impeller shaft extends vertically. The blower and the surrounding housing are pivotally arranged on the casing so that not only the blower is rendered accessible but also the sound reducing devices and the suction channel.
    Type: Grant
    Filed: July 18, 1974
    Date of Patent: June 1, 1976
    Assignee: Blech- und Metallwarenfabrik Robert Fischbach KG
    Inventors: Franz Siemes, Kraus, Joachim Buhl