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Arnulf A. Keller
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Seefeld(Oberbayern), DE
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Patent Grant
Reciprocating-piston engine, especially hot-gas engine or compressor
Patent number
4,271,669
Issue date
Jun 9, 1981
Arnulf A. Keller
F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS