Jack W. Fretwell, Jr.

📍 Herndon, VA: #272 of 878 inventorsTop 35%

🗺 Virginia: #9,471 of 34,511 inventorsTop 30%

Overall (All Time): #1,596,717 of 4,157,543Top 40%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
6840774	System to teach, measure and rate learner knowledge of basic mathematics facts	—	2005-01-11
4370783	Yieldable load release connector	—	1983-02-01
4270477	Device for the accelerated launching of light sails	—	1981-06-02