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David E. Hillgenberg

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  • La Habra, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method of making a perforated, molded container
    • Patent number 4,104,349
    • Issue date Aug 1, 1978
    • David E. Hillgenberg
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Carton with tab latch closure
    • Patent number 3,977,595
    • Issue date Aug 31, 1976
    • Dolco Packaging Corporation
    • David E. Hillgenberg
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL