Donald W. Calkins

📍 Devon, CT: #1 of 2 inventorsTop 50%

🗺 Connecticut: #15,609 of 34,797 inventorsTop 45%

Overall (All Time): #2,080,396 of 4,157,543Top 55%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
8570276	Augmented computer keyboard	—	2013-10-29
5114286	Interchangeable tool alignment system	—	1992-05-19