Patents by Inventor Dana Mortensen

Dana Mortensen 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).

  • Self grounding lamp for special use in an underwater environment
    Patent number: 5545952
    Abstract: An incandescent bulb for use in a submerged swimming pool light fixture is disclosed, which includes a filament, at least one spring-biased filament support, and a grounding device. The filament support includes an exposed current-conducting portion and is moveable in response to the spring bias. The current-conducting portion of the filament support is arranged to allow it to come into electrical contact with the grounding device when the filament support moves in response to the bias of the spring. The filament is disposed to prevent movement of the filament support when the filament is intact and the lamp is in normal operating condition.
    Type: Grant
    Filed: December 16, 1994
    Date of Patent: August 13, 1996
    Assignee: Essef Corporation
    Inventor: Dana Mortensen