HS

Harold G. Sowman

3M: 5 patents #4 of 563Top 1%
📍 Maplewood, MN: #1 of 33 inventorsTop 4%
🗺 Minnesota: #11 of 2,022 inventorsTop 1%
Overall (1989): #2,880 of 140,708Top 3%
5
Patents 1989

Issued Patents 1989

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
4883779 Ceramic articles containing silicon carbide Jerome W. McAllister, Lien-Huong T. Pham 1989-11-28
4816333 Silica coating Roger W. Lange, Soon-Kun Kang 1989-03-28
4801562 Refractory fibers of alumina and amorphous phosphorus pentoxide Tai T. Tran 1989-01-31
4800180 Ceramic articles containing silicon carbide Jerome W. McAllister, Lien-Huong T. Pham 1989-01-24
4797378 Internally modified ceramic fiber 1989-01-10