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NL9100897A
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Ventilation grill with hinged control valve.
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NL8900814A
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Ventilator grating with controllable ports - has sleeve type top and bottom body sections joined by end pieces
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NL8601336A
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Assembly of a window profile and a hinge and window formed by using such an assembly.
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NL8600287A
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Profiled seal for door or window rebate - has back of soft plastics and slot covered by hard plastics strip
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US4512244A
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Ventilation grating for use in window frames together with sealed unit insulating glass
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NL7909268A
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Distance holder for attaching a glass glass in one of a suspension using a glass frame.
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NL7900214A
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Grooved frame spacer for fixing window pane - has batten carrier block collars gripping support unit groove edges, with stop (NL 14.7.80)
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NL7714337A
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Ventilation grill.
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GB1506969A
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Frame construction
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