TREA

Elena N. Stolyarova

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  • Moscow, SU
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Patents Grantslast 30 patents

  • Information Patent Grant

    Apparatus for making serpentiform springs
    • Patent number 4,136,718
    • Issue date Jan 30, 1979
    • Alexei K. Ignatiev
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...