Preston von Helf

📍 Yucaipa, CA: #2 of 9 inventorsTop 25%

🗺 California: #24,257 of 60,394 inventorsTop 45%

Overall (2017): #276,537 of 506,227Top 55%

Patents 2017

Issued Patents 2017

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
9728944	Pull string advancing tool	—	2017-08-08