WD

William Christopher Duffy

Overall (2017): #198,771 of 506,227Top 40%
1
Patents 2017

Issued Patents 2017

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
9557071 Fire-rated modular duct assembly suitable for exhausting flammable or hazardous gases, vapours and other materials 2017-01-31