HL

Howard R. Longbrake

📍 Grafton, OH: #23 of 77 inventorsTop 30%
🗺 Ohio: #23,384 of 73,341 inventorsTop 35%
Overall (All Time): #1,596,266 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
7144310 Knife sharpener apparatus — 2006-12-05
4486982 Foldable holding device — 1984-12-11
4320892 Knife sharpener — 1982-03-23