HD

Howard A. Dowell

EN Enterra: 2 patents #2 of 8Top 25%
Overall (All Time): #2,353,840 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4525501 Protection against soiling Edward C. Norman 1985-06-25
4347266 Protection against soiling Edward C. Norman 1982-08-31