John W. Duckett

BS Barrier Systems: 3 patents #1 of 1Top 100%

📍 Tiburon, CA: #1 of 8 inventorsTop 15%

🗺 California: #293 of 10,592 inventorsTop 3%

Overall (1989): #9,604 of 140,708Top 7%

Patents 1989

Issued Patents 1989

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
4828425	Pre-loaded hinges for lane barrier system	—	1989-05-09
4815889	Lane barrier system with pivot control and method	—	1989-03-28
4806044	Anti-crash lane barrier with self-centering hinges	—	1989-02-21