Jianhan Yu

Person

  • Boulder, CO, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Portable heat source

    • Patent number 6,248,257
    • Issue date Jun 19, 2001
    • TDA Research, Inc.
    • William L. Bell
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Portable heat source

    • Patent number 5,935,486
    • Issue date Aug 10, 1999
    • TDA Research, Inc.
    • William L. Bell
    • F24 - HEATING RANGES VENTILATING