TREA

Sherman W. Twitchell

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  • Hopkinton, NH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Registration system
    • Patent number 4,070,226
    • Issue date Jan 24, 1978
    • Crathern Engineering Co., Inc.
    • Charles F. H. Crathern
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Process and apparatus for binding
    • Patent number 3,939,513
    • Issue date Feb 24, 1976
    • Crathern Engineering Co., Inc.
    • Charles F. H. Crathern
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER