John M. Helfrich

📍 McPherson, KS: #3 of 7 inventorsTop 45%

🗺 Kansas: #369 of 1,147 inventorsTop 35%

Overall (2023): #389,276 of 537,848Top 75%

Patents 2023

Issued Patents 2023

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
11571728	Adjustable diameter die assembly	—	2023-02-07