Philip L. Cowan

📍 Houston, TX: #210 of 924 inventorsTop 25%

🗺 Texas: #885 of 4,134 inventorsTop 25%

Overall (1989): #68,991 of 140,708Top 50%

Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4870890	Automatic reversing valve	—	1989-10-03