TREA

Lothar R. Zifferer

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  • Waco, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method of pointing and corrugating heat exchange tubing
    • Patent number 5,311,661
    • Issue date May 17, 1994
    • Packless Metal Hose Inc.
    • Lothar R. Zifferer
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Tube-in-shell heat exchanger with linearly corrugated tubing
    • Patent number 5,251,693
    • Issue date Oct 12, 1993
    • Lothar R. Zifferer
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    Heating apparatus and method
    • Patent number 4,846,148
    • Issue date Jul 11, 1989
    • Packless Metal Hose, Inc.
    • Lothar R. Zifferer
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Heating apparatus and method
    • Patent number 4,768,495
    • Issue date Sep 6, 1988
    • Packless Metal Hose, Inc.
    • Lothar R. Zifferer
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Tube corrugating die
    • Patent number 4,514,997
    • Issue date May 7, 1985
    • Packless Metal Hose, Inc.
    • Lothar R. Zifferer
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Tube corrugating apparatus and method
    • Patent number 4,377,083
    • Issue date Mar 22, 1983
    • Dale H. Shepherd
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...