DH

David T. Hemmings

🗺 California: #3,049 of 13,957 inventorsTop 25%
Overall (1994): #145,599 of 165,921Top 90%
1
Patents 1994

Issued Patents 1994

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5353552 Root-strength drill bit and method of making — 1994-10-11