TREA

David C. Burns

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  • San Francisco, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Venetian blind
    • Patent number D341744
    • Issue date Nov 30, 1993
    • Newell Operating Company
    • John F. Schaefer
    • D06 - Furnishings
  • Information Patent Grant

    Connector for wand and actuating mechanism
    • Patent number D335059
    • Issue date Apr 27, 1993
    • Levolor Corporation
    • John F. Schaefer
    • D06 - Furnishings
  • Information Patent Grant

    Window blind grip
    • Patent number D331681
    • Issue date Dec 15, 1992
    • Levolor Corporation
    • John F. Schaefer
    • D06 - Furnishings
  • Information Patent Grant

    Venetian blind
    • Patent number 5,127,458
    • Issue date Jul 7, 1992
    • Levolor Corporation
    • John F. Schaefer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Window blind headrail and mounting bracket
    • Patent number 5,042,553
    • Issue date Aug 27, 1991
    • Levolor Corporation
    • John F. Schaffer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS