Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
KC

Keith Eugene Coffman — 2 Patents

SPSimmonds Precision Products: 2 patents #61 of 227Top 30%
Shelburne, VT: #61 of 140 inventorsTop 45%
Vermont: #2,192 of 4,968 inventorsTop 45%
Overall (All Time): #2,208,695 of 4,157,543Top 55%
2 Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6662650 Method and apparatus for detecting a dry/wet state of a dual exposed thermistor bead liquid level sensor Scott R. Durkee 2003-12-16
4706203 Capacitive gauging method and apparatus Kurt A. Ramsdale 1987-11-10