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

David Thomas Lepley

PTPrometheus Applied Technologies: 3 patents #3 of 6Top 50%
HGHoerbiger Kompressortechnik Holding Gmbh: 1 patents #20 of 43Top 50%
Girard, OH: #10 of 55 inventorsTop 20%
Ohio: #18,857 of 73,341 inventorsTop 30%
Overall (All Time): #1,163,239 of 4,157,543Top 30%
4 Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
10550820 Time-varying spark current magnitude to improve spark plug performance and durability Luigi P. Tozzi, Maria-Emmanuella Sotiropoulou, Joseph M. Lepley, Steven B. Pirko 2020-02-04
10208651 Lean-burn pre-combustion chamber Luigi P. Tozzi, Maria-Emmanuella Sotiropoulou, Greg Beshouri 2019-02-19
10138799 Two-stage precombustion chamber for large bore gas engines Luigi P. Tozzi, Maria-Emmanuella Sotiropoulou 2018-11-27
9429132 Capacitive ignition system with ion-sensing and suppression of AC ringing Joseph M. Lepley, Steven B. Pirko, Arno Gschirr 2016-08-30