David McEwen

📍 Kalamazoo, MI: #22 of 62 inventorsTop 40%

🗺 Michigan: #416 of 1,972 inventorsTop 25%

Overall (1982): #70,350 of 81,411Top 90%

Patents 1982

Issued Patents 1982

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4347669	Navigational calculating device	—	1982-09-07