Separated by integral flanges engaging conduit exterior

Patents Grantslast 30 patents

  • Information Patent Grant

    3443634

    • Patent number 3,443,634
    • Issue date May 13, 1969
    • F28 - HEAT EXCHANGE IN GENERAL
  • Information Patent Grant

    3384168

    • Patent number 3,384,168
    • Issue date May 21, 1968
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    2713997

    • Patent number 2,713,997
    • Issue date Jul 26, 1955
    • F28 - HEAT EXCHANGE IN GENERAL

Patents Applicationslast 30 patents