TREA

Dirk J. Vermeulen

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  • Johannesburg, ZA
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Patents Grantslast 30 patents

  • Information Patent Grant

    Electrical protective circuits
    • Patent number 3,955,785
    • Issue date May 11, 1976
    • Dirk J. Vermeulen
    • B61 - RAILWAYS
  • Information Patent Grant

    Electrical detective circuits
    • Patent number 3,952,977
    • Issue date Apr 27, 1976
    • Western Industries (Proprietary) Limited
    • Dirk J. Vermeulen
    • B61 - RAILWAYS