DH

Douglas C. Holtvluwer

ET Emergency Technology: 1 patents #15 of 26Top 60%
📍 Jenison, MI: #94 of 168 inventorsTop 60%
🗺 Michigan: #49,615 of 86,293 inventorsTop 60%
Overall (All Time): #3,936,008 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

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