John D. Grinstead

📍 Durham, NC: #1,858 of 4,103 inventorsTop 50%

🗺 North Carolina: #18,756 of 45,564 inventorsTop 45%

Overall (All Time): #2,170,825 of 4,157,543Top 55%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
7073297	Component and method for restoring a stairway	—	2006-07-11
6895717	Component and method for restoring a stairway	—	2005-05-24