Roy K. Hill

SP Sperry: 3 patents #125 of 841Top 15%

📍 Bristol, VA: #45 of 147 inventorsTop 35%

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

Overall (All Time): #1,685,938 of 4,157,543Top 45%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
4306145	High stability no feedback optical transistor amplifier system	—	1981-12-15
4296332	Sprocket hole sensing detector for moving translucent paper sheets	—	1981-10-20
4288701	Mark sensing detector	—	1981-09-08