Zhenfeng Guo

Person

  • Solon, OH, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Lead-free solders

    • Patent number 6,176,947
    • Issue date Jan 23, 2001
    • H-Technologies Group, Incorporated
    • Jennie S. Hwang
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR