Wallis; Bernard J.

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  • Dearborn, MI, US

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  • Information Patent Grant

    Heat exchanger fin roll

    • Patent number 4,067,219
    • Issue date Jan 10, 1978
    • Wallis; Bernard J.
    • Sabatino A. Bianchi
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

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