Monday - December 23, 2024

Fire-Rated Ventilation Duct and Improvements Therein

2024-11-26

ALEXANDRIA, Virginia, Nov. 26 -- VAUGHANAIR CANADA ULC, Crofton, Maryland has been assigned a patent (No. US 12152802 B2, initially filed May 12, 2022) developed by William Christopher Duffy, Thornhill, Canada, for "Fire-rated ventilation duct and improvements therein." . . .

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Fire-Rated Ventilation Duct and Improvements Therein

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