having hollow blade

Patents Grantslast 30 patents

  • Information Patent Grant

    Freeze crystallization for the removal of water from a solution of...

    • Patent number 5,575,160
    • Issue date Nov 19, 1996
    • Waterworks International, Inc.
    • Arie Keus
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    Freeze crystrallization for the removal of water from a solution of...

    • Patent number 5,537,832
    • Issue date Jul 23, 1996
    • Waterworks International, Inc.
    • Arie Keus
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    Freeze crystallization for the removal of water from a solution of...

    • Patent number 5,394,706
    • Issue date Mar 7, 1995
    • Waterworks International, Inc.
    • Arie Keus
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    Heat exchanger

    • Patent number 4,856,580
    • Issue date Aug 15, 1989
    • Berwind Corporation
    • Richard A. Ley
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    3688837

    • Patent number 3,688,837
    • Issue date Sep 5, 1972
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    3548926

    • Patent number 3,548,926
    • Issue date Dec 22, 1970
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    3529661

    • Patent number 3,529,661
    • Issue date Sep 22, 1970
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    3457989

    • Patent number 3,457,989
    • Issue date Jul 29, 1969
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    3255814

    • Patent number 3,255,814
    • Issue date Jun 14, 1966
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    2899176

    • Patent number 2,899,176
    • Issue date Aug 11, 1959
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    2883163

    • Patent number 2,883,163
    • Issue date Apr 21, 1959
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    2761657

    • Patent number 2,761,657
    • Issue date Sep 4, 1956
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    2753159

    • Patent number 2,753,159
    • Issue date Jul 3, 1956
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    2733898

    • Patent number 2,733,898
    • Issue date Feb 7, 1956
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    2731241

    • Patent number 2,731,241
    • Issue date Jan 17, 1956
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    2610033

    • Patent number 2,610,033
    • Issue date Sep 9, 1952
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    1303470

    • Patent number 1,303,470
    • Issue date May 13, 1919
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    1086629

    • Patent number 1,086,629
    • Issue date Feb 10, 1914
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    1036704

    • Patent number 1,036,704
    • Issue date Aug 27, 1912
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    808321

    • Patent number 808,321
    • Issue date Dec 26, 1905
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    790466

    • Patent number 790,466
    • Issue date May 23, 1905
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    158246

    • Patent number 158,246
    • Issue date Dec 29, 1874
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL