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Duct joining system

Pipe joints or couplings – Packed – Wedge
Reexamination Certificate

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Duct joining system

Pipe joints or couplings – Packed – Flanged pipe
Patent

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Duct joint assembly

Pipe joints or couplings – Flange – Clamped
Patent

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Duct joint assembly

Pipe joints or couplings – Flange
Patent

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Duct joint frame

Pipe joints or couplings – Packed – Flanged pipe
Patent

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Duct joint link assembly

Pipe joints or couplings – With strain relief
Patent

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Duct jointing system

Pipe joints or couplings – Packed – Flanged pipe
Patent

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Duct jointing system

Pipe joints or couplings – Materials – Sheet
Patent

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Duct jointing system

Pipe joints or couplings – Packed – Flanged pipe
Patent

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Duct passing through a wall aperture

Pipe joints or couplings – With casing – lining or protector – Escutcheon type
Patent

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Duct reinforcement

Pipe joints or couplings – Materials – Sheet
Patent

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Duct seal

Pipe joints or couplings – End to side or plate – Penetrating
Patent

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Duct sealing apparatus

Pipe joints or couplings – Flexible joint – rigid members – Resilient sleeve type
Reexamination Certificate

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Duct separation restraint apparatus and method

Pipe joints or couplings – Safety release
Reexamination Certificate

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Duct structure with reinforced end flanges

Pipe joints or couplings – Molded joint – Interlocked
Patent

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Duct system and method

Pipe joints or couplings – Materials – Sheet
Reexamination Certificate

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Duct-damper interface adaptor

Pipe joints or couplings – Particular interface – Annular socket
Patent

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Ductboard collar

Pipe joints or couplings – End to side or plate
Patent

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Ductile iron pipe joint employing a coupling and coupling theref

Pipe joints or couplings – Packed – Sleeve
Patent

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Ductwork connecting

Pipe joints or couplings – Connector for conduit housing electromagnetic line: – Having box and connector
Patent

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