TREA

David A. May

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  • Brookline, MA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Roman shades
    • Patent number 4,921,032
    • Issue date May 1, 1990
    • Appropriate Technology Corporation
    • David A. May
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Edge seal and rerailer for insulating shade
    • Patent number 4,651,796
    • Issue date Mar 24, 1987
    • Appropriate Technology Corporation
    • Bruce C. Gardner
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Edge seal and rerailer for insulating shade
    • Patent number 4,516,618
    • Issue date May 14, 1985
    • Appropriate Technology Corporation
    • Bruce C. Gardner
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Insulating window covering
    • Patent number 4,418,739
    • Issue date Dec 6, 1983
    • Appropriate Technology Corporation
    • James Woolnough
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS