TREA

Franz Chromy

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Patents Grantslast 30 patents

  • Information Patent Grant

    Hammer drill with pneumatically driven percussion piston
    • Patent number 4,732,219
    • Issue date Mar 22, 1988
    • Hilti Aktiengesellschaft
    • Franz Chromy
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Motor driven drilling or chipping device
    • Patent number 4,611,670
    • Issue date Sep 16, 1986
    • Hilti Aktiengesellschaft
    • Franz Chromy
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Hammer drill
    • Patent number 4,366,869
    • Issue date Jan 4, 1983
    • Hilti Aktiengesellschaft
    • Rolf Bereiter
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Motor-driven hammer drill
    • Patent number 4,222,443
    • Issue date Sep 16, 1980
    • Hilti Aktiengesellschaft
    • Franz Chromy
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS