TREA

Walter J. Sperko

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  • Kernersville, NC, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Dimpler and method
    • Patent number 7,481,092
    • Issue date Jan 27, 2009
    • Walter J. Sperko
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Pipe fitting tool and method
    • Patent number 7,013,699
    • Issue date Mar 21, 2006
    • Walter J. Sperko
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Tubular fitting, tool and method
    • Patent number 6,269,674
    • Issue date Aug 7, 2001
    • Walter J. Sperko
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Sterilizer cart
    • Patent number 5,072,960
    • Issue date Dec 17, 1991
    • Sterilizer Technologies Corporation
    • Walter J. Sperko
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Closure apparatus and method
    • Patent number 4,932,160
    • Issue date Jun 12, 1990
    • Sterilizer Technologies Corporation
    • Walter J. Sperko
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES