TREA

David S. Blumenthal

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  • Natick, MA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Paper punch
    • Patent number 5,490,440
    • Issue date Feb 13, 1996
    • Clix Products, Inc.
    • Robert G. Karlis
    • B26 - HAND CUTTING TOOLS CUTTING SEVERING
  • Information Patent Grant

    Paper perforating device
    • Patent number 5,291,813
    • Issue date Mar 8, 1994
    • Clix Products, Inc.
    • David S. Blumenthal
    • B26 - HAND CUTTING TOOLS CUTTING SEVERING