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Radial engine

Internal-combustion engines – Multiple cylinder – Cylinders in-line
Patent

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Reciprocating engine

Internal-combustion engines – Multiple cylinder – Cylinders in-line
Patent

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Reciprocating internal combustion engine

Internal-combustion engines – Multiple cylinder – Cylinders in-line
Reexamination Certificate

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Reciprocating machine with refrigerated cooling of intake air

Internal-combustion engines – Multiple cylinder – Cylinders in-line
Patent

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Reciprocatory machines

Internal-combustion engines – Multiple cylinder – Cylinders in-line
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Ringless piston engine

Internal-combustion engines – Multiple cylinder – Cylinders in-line
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Rotary cylinder head for barrel type engine

Internal-combustion engines – Multiple cylinder – Cylinders in-line
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Rotary motion transformer

Internal-combustion engines – Multiple cylinder – Cylinders in-line
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Rotary sleeve-valve internal combustion engine

Internal-combustion engines – Multiple cylinder – Cylinders in-line
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Rotating cylinder valve engine

Internal-combustion engines – Multiple cylinder – Cylinders in-line
Reexamination Certificate

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Rotor engine

Internal-combustion engines – Multiple cylinder – Cylinders in-line
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