RS

Roger D. Shaffer

📍 Johnstown, PA: #5 of 14 inventorsTop 40%
🗺 Pennsylvania: #1,270 of 5,047 inventorsTop 30%
Overall (2004): #124,645 of 270,089Top 50%
1
Patents 2004

Issued Patents 2004

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6679372 Quarter displaying and teaching device — 2004-01-20