DF

Derek Frost

📍 Leigh on Sea, GB: #2 of 3 inventorsTop 70%
Overall (1997): #160,284 of 185,788Top 90%
1
Patents 1997

Issued Patents 1997

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5671706 Variable valve timing Timothy Mark Lancefield 1997-09-30