Window opening and closing device

Tools and hardware – Handle – knob or pull – Singular point of attachment

Patent

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0806

Patent

active

D03893944

REFERENCES:
patent: D296651 (1988-07-01), de Armas
patent: D329178 (1992-09-01), Ackerman
patent: D342004 (1993-12-01), Wettstein
patent: D343348 (1994-01-01), Ito et al.
patent: 4846025 (1989-07-01), Keller et al.
patent: 5518440 (1996-05-01), Bone

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