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Paul Humphreys
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Bellingham, WA, US
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last 30 patents
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Patent Grant
Uninterruptible power supplies using fuel cells
Patent number
6,602,627
Issue date
Aug 5, 2003
Alpha Technologies, Inc.
Frank Liu
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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last 30 patents
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Patent Application
Uninterruptible power supplies employing fuel cells
Publication number
20020006536
Publication date
Jan 17, 2002
Frank Liu
H01 - BASIC ELECTRIC ELEMENTS