David L. Piekarski

📍 Ashby, MN: #1 of 2 inventorsTop 50%

🗺 Minnesota: #23,881 of 52,454 inventorsTop 50%

Overall (All Time): #2,191,402 of 4,157,543Top 55%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
6799423	Adjustable exhaust system for internal combustion engine	—	2004-10-05
6742332	Exhaust system for internal combustion engine having parallelogram-shaped cross-section	—	2004-06-01