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Richard C. M. Koo

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  • San Francisco, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Electrically heated soldering device
    • Patent number 4,045,651
    • Issue date Aug 30, 1977
    • Richard C. M. Koo
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR