TREA

Sung Jen Chen

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  • Andover, MA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Dispensing and mixing apparatus
    • Patent number RE36235
    • Issue date Jun 29, 1999
    • Keller; Wilhelm
    • Wilhelm A. Keller
    • 222 - Dispensing
  • Information Patent Grant

    Dispensing and mixing apparatus
    • Patent number 4,767,026
    • Issue date Aug 30, 1988
    • Wilhelm A. Keller
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL