TREA

John A. Letchford

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  • Enfield, GB
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Patents Grantslast 30 patents

  • Information Patent Grant

    Tungsten halogen lamp
    • Patent number 5,157,758
    • Issue date Oct 20, 1992
    • THORN EMI plc
    • Alex L. Halberstadt
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Filter holder
    • Patent number D291368
    • Issue date Aug 11, 1987
    • THORN EMI plc
    • John A. Letchford
    • D26 - Lighting
  • Information Patent Grant

    Quartz infra-red lamps
    • Patent number 4,598,194
    • Issue date Jul 1, 1986
    • THORN EMI plc
    • Alex L. Halberstadt
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Heating apparatus
    • Patent number 4,556,786
    • Issue date Dec 3, 1985
    • Thorn Emi Domestic Appliances Limited
    • Kenneth S. Frost
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR