Patents by Inventor Douglas B. Rusth

Douglas B. Rusth 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).

  • Air circulator
    Patent number: 4185545
    Abstract: An air circulating device for suspension from a roof or ceiling structure and including a duct through which upper room air may be directed for discharge into lower temperature air immediately above the room floor. A support structure houses a fan and motor assembly and a collar to receive the duct upper end. The inflatable duct is of a yieldable nature and terminates in spaced relationship to the floor. Provision is made for mixing lower room air with the duct airflow and for the imparting of a rotational direction to the duct discharged airflow.
    Type: Grant
    Filed: July 3, 1978
    Date of Patent: January 29, 1980
    Inventors: Douglas B. Rusth, David A. Martin
  • Air circulator
    Patent number: D254803
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: April 22, 1980
    Inventors: Douglas B. Rusth, David A. Martin
  • Air circulator
    Patent number: D269114
    Type: Grant
    Filed: November 17, 1980
    Date of Patent: May 24, 1983
    Inventors: Douglas B. Rusth, David A. Martin