involving an upper drum and a lower drum and two lateral drums

Patents Grantslast 30 patents

  • Information Patent Grant

    2034547

    • Patent number 2,034,547
    • Issue date Mar 17, 1936
    • F22 - STEAM GENERATION
  • Information Patent Grant

    1971851

    • Patent number 1,971,851
    • Issue date Aug 28, 1934
    • F22 - STEAM GENERATION
  • Information Patent Grant

    1950043

    • Patent number 1,950,043
    • Issue date Mar 6, 1934
    • F22 - STEAM GENERATION
  • Information Patent Grant

    1934965

    • Patent number 1,934,965
    • Issue date Nov 14, 1933
    • F22 - STEAM GENERATION
  • Information Patent Grant

    1880350

    • Patent number 1,880,350
    • Issue date Oct 4, 1932
    • F22 - STEAM GENERATION
  • Information Patent Grant

    1813058

    • Patent number 1,813,058
    • Issue date Jul 7, 1931
    • F22 - STEAM GENERATION
  • Information Patent Grant

    1657951

    • Patent number 1,657,951
    • Issue date Jan 31, 1928
    • F22 - STEAM GENERATION
  • Information Patent Grant

    1552296

    • Patent number 1,552,296
    • Issue date Sep 1, 1925
    • F22 - STEAM GENERATION
  • Information Patent Grant

    1437790

    • Patent number 1,437,790
    • Issue date Dec 5, 1922
    • F22 - STEAM GENERATION
  • Information Patent Grant

    981722

    • Patent number 981,722
    • Issue date Jan 17, 1911
    • F22 - STEAM GENERATION
  • Information Patent Grant

    872378

    • Patent number 872,378
    • Issue date Dec 3, 1907
    • F22 - STEAM GENERATION
  • Information Patent Grant

    853182

    • Patent number 853,182
    • Issue date May 7, 1907
    • F22 - STEAM GENERATION
  • Information Patent Grant

    843613

    • Patent number 843,613
    • Issue date Feb 12, 1907
    • F22 - STEAM GENERATION
  • Information Patent Grant

    806524

    • Patent number 806,524
    • Issue date Dec 5, 1905
    • F22 - STEAM GENERATION
  • Information Patent Grant

    776701

    • Patent number 776,701
    • Issue date Dec 6, 1904
    • F22 - STEAM GENERATION
  • Information Patent Grant

    776923

    • Patent number 776,923
    • Issue date Dec 6, 1904
    • F22 - STEAM GENERATION
  • Information Patent Grant

    774564

    • Patent number 774,564
    • Issue date Nov 8, 1904
    • F22 - STEAM GENERATION
  • Information Patent Grant

    616088

    • Patent number 616,088
    • Issue date Dec 20, 1898
    • F22 - STEAM GENERATION
  • Information Patent Grant

    340183

    • Patent number 340,183
    • Issue date Apr 20, 1886
    • F22 - STEAM GENERATION
  • Information Patent Grant

    234123

    • Patent number 234,123
    • Issue date Nov 9, 1880
    • F22 - STEAM GENERATION
  • Information Patent Grant

    197894

    • Patent number 197,894
    • Issue date Dec 4, 1877
    • F22 - STEAM GENERATION
  • Information Patent Grant

    193848

    • Patent number 193,848
    • Issue date Aug 7, 1877
    • F22 - STEAM GENERATION
  • Information Patent Grant

    135219

    • Patent number 135,219
    • Issue date Jan 28, 1873
    • F22 - STEAM GENERATION
  • Information Patent Grant

    109807

    • Patent number 109,807
    • Issue date Dec 6, 1870
    • F22 - STEAM GENERATION
  • Information Patent Grant

    105243

    • Patent number 105,243
    • Issue date Jul 12, 1870
    • F22 - STEAM GENERATION
  • Information Patent Grant

    77670

    • Patent number 77,670
    • Issue date May 5, 1868
    • F22 - STEAM GENERATION
  • Information Patent Grant

    71903

    • Patent number 71,903
    • Issue date Dec 10, 1867
    • F22 - STEAM GENERATION
  • Information Patent Grant

    40391

    • Patent number 40,391
    • Issue date Oct 27, 1863
    • F22 - STEAM GENERATION
  • Information Patent Grant

    11110

    • Patent number 11,110
    • Issue date Jun 20, 1854
    • F22 - STEAM GENERATION