PS

Philip H. Stevenson

HI Hmi Industries: 2 patents #4 of 11Top 40%
HE Health-Mor: 1 patents #3 of 4Top 75%
📍 Cleveland, OH: #477 of 1,781 inventorsTop 30%
🗺 Ohio: #23,384 of 73,341 inventorsTop 35%
Overall (All Time): #1,642,033 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5651811 Filter system Robert A. Frey 1997-07-29
5593479 Filter system Robert A. Frey 1997-01-14
5248323 Vacuum cleaner and filter thereof — 1993-09-28