Patent Leaderboard

PS

Philip H. Stevenson

HI Hmi Industries: 2 patents #2 of 2Top 100%

📍 Cleveland, OH: #5 of 60 inventorsTop 9%

🗺 Ohio: #519 of 4,576 inventorsTop 15%

Overall (1997): #27,351 of 185,788Top 15%

2

Patents 1997

Issued Patents 1997

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
5651811	Filter system	Robert A. Frey	1997-07-29
5593479	Filter system	Robert A. Frey	1997-01-14