Zell Du Vall

TC Tsi Group Co.: 4 patents #12 of 151Top 8%

📍 Windom, MN: #813 of 2,819 inventorsTop 30%

🗺 Minnesota: #15,886 of 52,454 inventorsTop 35%

Overall (All Time): #1,308,820 of 4,157,543Top 35%

Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
4471654	Fluid flow measuring apparatus	—	1984-09-18
4394825	Fluid flow measuring apparatus	—	1983-07-26
D266316	Fluid flow measuring head	—	1982-09-28
4331037	Fluid flow measuring apparatus	—	1982-05-25