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

Ralph Mitchell

Motorola: 3 patents #3,303 of 12,470Top 30%
Lexington, MA: #751 of 2,299 inventorsTop 35%
Massachusetts: #20,307 of 88,656 inventorsTop 25%
Overall (All Time): #888,003 of 4,157,543Top 25%
6 Patents All Time

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
5809185 Sensor for detecting microorganisms 1998-09-15
5554921 Battery charger apparatus and method with multiple range current control Edward Li, John H. Aseltine 1996-09-10
5500579 Electric motor control with integral battery charger Sang Hoon Kim, Edward Li 1996-03-19
4780656 Drive and protection system for variable speed motor 1988-10-25
4713347 Measurement of ligand/anti-ligand interactions using bulk conductance David Mitchell 1987-12-15
4220688 Protecting wood from wood degrading organisms Thomas D. Sleeter 1980-09-02