CJ

Charles F. Johnston

📍 Fincastle, VA: #10 of 20 inventorsTop 50%
🗺 Virginia: #12,642 of 34,511 inventorsTop 40%
Overall (All Time): #2,344,468 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4690171 Valve assembly for a sphygmomanometer — 1987-09-01
4595036 Rotary control valve having quick emergency exhausting means — 1986-06-17