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Merlan J. Rolffs

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  • Pella, IA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Jamb extension assembly for doors and windows
    • Patent number 5,791,104
    • Issue date Aug 11, 1998
    • Pella Corporation
    • Bruce Baier
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Window panel with breather system
    • Patent number 5,299,399
    • Issue date Apr 5, 1994
    • Pella Corporation
    • Bruce A. Baier
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Window unit nailing fin and corner lock
    • Patent number 5,210,986
    • Issue date May 18, 1993
    • Rolscreen Company
    • Bruce A. Hagemeyer
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS