Norman P. Proehl

📍 Lake Forest, IL: #143 of 431 inventorsTop 35%

🗺 Illinois: #26,653 of 84,256 inventorsTop 35%

Overall (All Time): #1,670,565 of 4,157,543Top 45%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
4826219	Hydraulic dredge pipeline coupling	—	1989-05-02
4593484	Method of dredging with a pivotally mounted cutter head	—	1986-06-10
4470209	Dredge swinging apparatus	—	1984-09-11