DS

Douglas L. Sprung

📍 Langley, WA: #37 of 107 inventorsTop 35%
🗺 Washington: #27,877 of 76,902 inventorsTop 40%
Overall (All Time): #1,675,270 of 4,157,543Top 45%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
4651914 Mobile pipe mill John P. D. Sprung 1987-03-24
4651915 Mobile pipe mill — 1987-03-24
4632366 Line travel normalizer — 1986-12-30