Derrick K. Barr

📍 Crofton, NE: #2 of 3 inventorsTop 70%

🗺 Nebraska: #2,834 of 5,697 inventorsTop 50%

Overall (All Time): #3,200,671 of 4,157,543Top 80%

Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
8141498	Rail car extension system	Christopher J. McCallum, David J. Schaefer	2012-03-27