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Valentin I. Grigoriev

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  • Voronezh, SU
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Patents Grantslast 30 patents

  • Information Patent Grant

    High-speed anvilless hammer
    • Patent number 4,178,792
    • Issue date Dec 18, 1979
    • Petr P. Matviets
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...