GM

Gregg Marshel

VT Vapor Systems Technologies: 1 patents #1 of 3Top 35%
📍 San Tan Valley, AZ: #1 of 10 inventorsTop 10%
🗺 Arizona: #1,002 of 3,383 inventorsTop 30%
Overall (2025): #379,465 of 469,880Top 85%
1
Patents 2025

Issued Patents 2025

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
12391540 Pressure/vacuum (PV) valve for fuel storage tanks, in-line pressure-vacuum valve test unit, and combination thereof Rodger P. Grantham, Douglas Alan Harty 2025-08-19