DH

Douglas C. Holtvluwer

ET Emergency Technology: 1 patents #1 of 1Top 100%
📍 Jenison, MI: #2 of 9 inventorsTop 25%
🗺 Michigan: #694 of 3,452 inventorsTop 25%
Overall (1989): #135,687 of 140,708Top 100%
1
Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4859988 Automotive vehicle exterior light flashing circuit — 1989-08-22