Patents by Inventor David Dhanens

David Dhanens 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).

  • Altitude monitor
    Patent number: 4453154
    Abstract: An apparatus to continuously monitor a preset altitude for a pilot of an aircraft. It senses a change in altitude and an audible as well as a visible alarm tells the pilot that he has deviated from his preset altitude by a given height. Increase in altitude is signaled by a high pitch tone and by a yellow light while a decrease in altitude is signaled by a low pitch tone and a red light. The invention can also be used to warn a small boat operator of a pressure drop.
    Type: Grant
    Filed: August 14, 1981
    Date of Patent: June 5, 1984
    Assignee: Tech Nomadic Corporation
    Inventors: Joseph M. Rait, David Dhanens