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John Holden
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Billerica, MA, US
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last 30 patents
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Patent Grant
Rotary steam engine
Patent number
7,836,697
Issue date
Nov 23, 2010
Torque Applications, Inc.
John Holden
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Patents Applications
last 30 patents
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Patent Application
ROTARY STEAM ENGINE
Publication number
20090142211
Publication date
Jun 4, 2009
Torque Applications, Inc.
John Holden
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES