Ralph E. Henry

DI Dresser Industries: 4 patents #60 of 787Top 8%

📍 Rixford, PA: #1 of 2 inventorsTop 50%

🗺 Pennsylvania: #19,182 of 74,527 inventorsTop 30%

Overall (All Time): #1,302,324 of 4,157,543Top 35%

Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
4878697	Compression coupling for plastic pipe	—	1989-11-07
4794944	Plastic valve	—	1989-01-03
4744390	Plastic valve	—	1988-05-17
4597147	Stop changer tool for in-service valve	—	1986-07-01