Helical

Patents Grantslast 30 patents

  • Information Patent Grant

    Rotary tube cooler construction

    • Patent number 4,711,297
    • Issue date Dec 8, 1987
    • MAN Gutehoffnungshutte GmbH
    • Heinz Haacker
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    3623548

    • Patent number 3,623,548
    • Issue date Nov 30, 1971
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    1839057

    • Patent number 1,839,057
    • Issue date Dec 29, 1931
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    1160481

    • Patent number 1,160,481
    • Issue date Nov 16, 1915
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    1073945

    • Patent number 1,073,945
    • Issue date Sep 23, 1913
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    443201

    • Patent number 443,201
    • Issue date Dec 23, 1890
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    308529

    • Patent number 308,529
    • Issue date Nov 25, 1884
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    231861

    • Patent number 231,861
    • Issue date Aug 31, 1880
    • F28 - HEAT EXCHANGE IN GENERAL