TREA

Herbert Windelbandt

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  • Aachen, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method for manufacturing a poppet valve head
    • Patent number 4,926,534
    • Issue date May 22, 1990
    • Sempell Armaturen GmbH
    • Herbert Windelbandt
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...