John H. Crabtree

📍 Yorba Linda, CA: #371 of 818 inventorsTop 50%

🗺 California: #185,134 of 386,348 inventorsTop 50%

Overall (All Time): #2,157,286 of 4,157,543Top 55%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
7217275	Tunnel port apparatus with serial gas-check assembly	—	2007-05-15
7214228	Tunnel port apparatus	—	2007-05-08