John M. Helfrich

📍 McPherson, KS: #26 of 70 inventorsTop 40%

🗺 Kansas: #4,268 of 12,005 inventorsTop 40%

Overall (All Time): #1,797,072 of 4,157,543Top 45%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
11571728	Adjustable diameter die assembly	—	2023-02-07
11079199	Pellet magazine	—	2021-08-03