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Douglas A. Simpson
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Cambridge, MA, US
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Patents Grants
last 30 patents
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Patent Grant
Damper and valve
Patent number
6,427,812
Issue date
Aug 6, 2002
Active Control eXperts, Inc.
Edward F. Crawley
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Damper and valve
Patent number
6,193,029
Issue date
Feb 27, 2001
Active Control eXperts, Inc.
Edward F. Crawley
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Patents Applications
last 30 patents
Information
Patent Application
Damper and valve
Publication number
20010025752
Publication date
Oct 4, 2001
Edward F. Crawley
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...