Hans H. Doyen

Person

  • Neustadt-Gimmeldingen, DE

Patents Grantslast 30 patents

  • Information Patent Grant

    Apparatus for picking up dog excrement

    • Patent number 4,796,327
    • Issue date Jan 10, 1989
    • Ing. Alfred Schmidt GmbH
    • Hans H. Doyen
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES