John H. Stempel

📍 Coleman, TX: #6 of 12 inventorsTop 50%

🗺 Texas: #73,555 of 125,132 inventorsTop 60%

Overall (All Time): #4,031,354 of 4,157,543Top 100%

Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4437839	Chalkboard with hinged chalk rail	—	1984-03-20