DH

David Harvey

UN Unknown: 1 patents #206 of 2,107Top 10%
📍 Calgary, CA: #23 of 156 inventorsTop 15%
Overall (1997): #163,382 of 185,788Top 90%
1
Patents 1997

Issued Patents 1997

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5655256 Duct cleaning apparatus Bill L. Hendrix, Frank Goodman 1997-08-12