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  5. Multiple piston, common nonrestrictive combustion chamber
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Double crankshaft valved two cycle engine

Internal-combustion engines – Multiple piston – common nonrestrictive combustion chamber – Four-cycle
Patent

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Double piston cycle engine

Internal-combustion engines – Multiple piston – common nonrestrictive combustion chamber – Four-cycle
Reexamination Certificate

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Drive arrangement for internal combustion engine

Internal-combustion engines – Multiple piston – common nonrestrictive combustion chamber – Four-cycle
Patent

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Dual compression and dual expansion internal combustion engine a

Internal-combustion engines – Multiple piston – common nonrestrictive combustion chamber – Four-cycle
Patent

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Dual piston cylinder configuration for internal combustion...

Internal-combustion engines – Multiple piston – common nonrestrictive combustion chamber – Four-cycle
Reexamination Certificate

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Dual piston internal combustion engine

Internal-combustion engines – Multiple piston – common nonrestrictive combustion chamber – Four-cycle
Patent

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