TREA

Harp; Elwyn V.

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  • West Hartford, CT, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Flushing means
    • Patent number 4,922,556
    • Issue date May 8, 1990
    • Harp; Elwyn V.
    • Vernon D. Roosa
    • E03 - WATER SUPPLY SEWERAGE
  • Information Patent Grant

    Flushing means
    • Patent number 4,842,011
    • Issue date Jun 27, 1989
    • Harp; Elwyn V.
    • Vernon D. Roosa
    • E03 - WATER SUPPLY SEWERAGE