Howard T. DeGraffenreid

📍 Inola, OK: #4 of 24 inventorsTop 20%

🗺 Oklahoma: #2,630 of 12,736 inventorsTop 25%

Overall (All Time): #1,304,483 of 4,157,543Top 35%

Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
4749485	Triangular filter cartridge having triangular passage	—	1988-06-07
4715954	Triangular filter cartridge and apparatus	—	1987-12-29
4613438	Triangular filter cartridge and apparatus	—	1986-09-23
4320005	Coalescer or filter end cap	—	1982-03-16