Patents Represented by Attorney H. Fredrick Hanamm

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  • Dual filament lamp and drive apparatus for dimmable avionics displays
    Patent number: 5296783
    Abstract: An improved dimmable dual filament fluorescent lamp including a first filament and a second filament with automatic current switching between the first element and the second element when the first element opens due to a failure and further having a separating cold cathode getter plate disposed between the first filament and the second filament.
    Type: Grant
    Filed: April 30, 1992
    Date of Patent: March 22, 1994
    Assignee: Rockwell International Corporation
    Inventor: Gregory M. Fischer