Friedrich Wellner

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Holzheim, DE

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Patents Grantslast 30 patents

Information Patent Grant
Muffler with variable sound-absorbing characteristics
- Patent number 6,499,562
- Issue date Dec 31, 2002
- Zeuna-Staerker GmbH & Co. KG
- Gerhard Elfinger
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES