JS

John R. Spelman

📍 Glen Arm, MD: #3 of 6 inventorsTop 50%
🗺 Maryland: #983 of 3,610 inventorsTop 30%
Overall (2017): #363,050 of 506,227Top 75%
1
Patents 2017

Issued Patents 2017

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
9586122 Golf putting trainer device Trevor Alan Wade 2017-03-07