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David Alan Putnam

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  • West Monroe, LA, US
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Patents Applicationslast 30 patents

  • Information Patent Application

    EXTENSION PIPE FOR MANHOLE COVER
    • Publication number 20230193580
    • Publication date Jun 22, 2023
    • Sewer Sentry LLC
    • David Alan Putnam
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    VENTED PRECIPITATION GUARDING MANHOLE COVER ASSEMBLY
    • Publication number 20220112678
    • Publication date Apr 14, 2022
    • Sewer Sentry LLC
    • David Alan Putnam
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    REINFORCED MANHOLE COVER GASKET
    • Publication number 20220081869
    • Publication date Mar 17, 2022
    • Sewer Sentry LLC
    • William Eugene Putnam
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING