KB

Keith Butterfield

📍 Portland, ME: #112 of 276 inventorsTop 45%
🗺 Maine: #1,571 of 4,281 inventorsTop 40%
Overall (All Time): #1,924,660 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
10864007 Abrading device and method for creating abrasions on a membrane — 2020-12-15
7879056 Pleurabrade device Kevin Butterfield 2011-02-01