Inventor
BELL DEAN A
US9 patents
Patents
9 patentsUS6693381B2Feb 17, 2004
Lamp and fan thermal control by directed air flow
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US6498423B1Dec 24, 2002
Lamp thermal control by directed air flow
WELCH ALLYN INC28 citations88
US6626725B1Sep 30, 2003
Electrode treatment surface process for reduction of a seal cracks in quartz
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US5910707AJun 8, 1999
Tungsten halogen lamp
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US5886466AMar 23, 1999
Miniature two-pin tungsten halogen lamp
WELCH ALLYN INC13 citations68
US5359262AOct 25, 1994
Sub-miniature tungsten halogen lamp with major inert gas and minor halide gas constitutes
WELCH ALLYN INC5 citations53
US7218046B2May 15, 2007
Unitized chemically etched tungsten electrode
WELCH ALLYN INC0 citations50
US7101245B2Sep 5, 2006
Stable electrode design and method
WELCH ALLYN INC0 citations50
US6774565B2Aug 10, 2004
Electrode surface treatment process
WELCH ALLYN INC0 citations50