4. Gas separation
  5. Combined or convertible

Clifford A. Schroeder

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Adjustable head rest for lounges

Chairs and seats – Headrest – Portable – with seat attacher
Patent

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Duct core with strengthening tape

Pipes and tubular conduits – Flexible – Spirally wound material
Patent

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Fire retarding heating and cooling duct

Pipes and tubular conduits – Distinct layers – With intermediate insulation layer
Patent

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Method for strengthening duct cores

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent

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Method of making a rigid fiberglass duct having an integral bend

Metal working – Method of mechanical manufacture – Assembling or joining
Patent

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Profile ID: LFUS-PAI-P-332645

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