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Douglas Marshall Johns
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Topanga, CA, US
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Patents Grants
last 30 patents
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Patent Grant
Rotating barrel type internal combustion engine
Patent number
7,677,210
Issue date
Mar 16, 2010
Lawrence C. Chasin
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information
Patent Grant
Rotating positive displacement engine
Patent number
7,210,429
Issue date
May 1, 2007
Douglas Marshall Johns
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Patents Applications
last 30 patents
Information
Patent Application
ROTATING BARREL TYPE INTERNAL COMBUSTION ENGINE
Publication number
20070169728
Publication date
Jul 26, 2007
Lawrence C. Chasin
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information
Patent Application
Rotating positive displacement engine
Publication number
20030131807
Publication date
Jul 17, 2003
Douglas Marshall Johns
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES