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

Lewis Illingworth

VOVortex: 13 patents #1 of 6Top 20%
AIAvionic Instruments: 10 patents #1 of 1Top 100%
VOVortexhc: 5 patents #1 of 2Top 50%
Exeter, NH: #7 of 228 inventorsTop 4%
New Hampshire: #325 of 12,181 inventorsTop 3%
Overall (All Time): #119,925 of 4,157,543Top 3%
31 Patents All Time

Issued Patents All Time

Showing 26–31 of 31 patents

Patent #TitleCo-InventorsDate
6256213 Means for transformer rectifier unit regulation 2001-07-03
6144193 Isolated transformer coupled gate drive for signals having variable duty cycle 2000-11-07
5831838 Resonant fly-forward converter circuit 1998-11-03
5444357 Method and apparatus for three-phase voltage doubling 1995-08-22
5424933 Resonant forward converter circuit with control circuit for controlling switching transistor on and off times 1995-06-13
4636927 DC to AC converter Earl C. Rhyne 1987-01-13