Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
LS

Louis J. Serrano — 136 Patents

TETula Etechnology: 86 patents #1 of 93Top 2%
IBM: 39 patents #2,426 of 70,183Top 4%
LSLsi: 10 patents #319 of 3,238Top 10%
General Motors: 4 patents #3,757 of 18,328Top 25%
CUCummins: 4 patents #476 of 2,217Top 25%
HGHGST: 1 patents #1,167 of 1,677Top 70%
San Jose, CA: #132 of 32,062 inventorsTop 1%
California: #1,228 of 386,348 inventorsTop 1%
Overall (All Time): #7,627 of 4,157,543Top 1%
136 Patents All Time
Louis J. Serrano has been granted 136 US patents while listed as an inventor at Tula Etechnology. The first was granted in 1997 and the most recent in January 2025. Louis J. Serrano ranks #7,627 of 4,157,543 US inventors in our database (top 0.18%). Patent records list Louis J. Serrano in San Jose, CA, US.

Patents per Year

Patents granted per year, 1997 to 2025Bar chart with a peak of 14 patents in 2019.peak 141997: 1 patents19971998: 5 patents1999: 5 patents2000: 8 patents20002001: 6 patents2002: 9 patents2003: 5 patents20032004: 1 patents2006: 2 patents2008: 2 patents20082009: 4 patents2011: 2 patents2013: 1 patents20132014: 3 patents2015: 2 patents2016: 8 patents20162017: 7 patents2018: 10 patents2019: 14 patents20192020: 9 patents2021: 10 patents2022: 12 patents20222023: 7 patents2024: 2 patents2025: 1 patents2025

Issued Patents All Time

Showing 1–25 of 136 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12209515 Dynamic cylinder deactivation life factor to modify cylinder deactivation strategy Timothy R. Frazier, J. Steven Kolhouse, Steven John Small 2025-01-28
11959432 Exhaust valve failure diagnostics and management Robert C. Wang, Shikui Kevin Chen 2024-04-16
11933202 Dynamic cylinder deactivation life factor to modify cylinder deactivation strategy Timothy R. Frazier, J. Steven Kolhouse, Steven John Small 2024-03-19 $68,359,000
11821379 Non-rotating cylinder pattern selection for equalizing cylinder usage in an internal combustion engine Xin Yuan, Shikui Kevin Chen, Xi Luo, Robert C. Wang, Xiaoping Cai +1 more 2023-11-21
11719175 Motor torque smoothing on combustion engines by approximating a periodic waveform using sinusoids Vijay Srinivasan 2023-08-08
11685380 Managing engine firing fraction changes during gear shifts Xiaoping Cai, Andrew W. Phillips 2023-06-27
11680505 Separately determining firing density and pumping density during firing density transitions for a lean-burn internal combustion engine Shikui Kevin Chen, Matthew A. Younkins 2023-06-20
11624335 Exhaust valve failure diagnostics and management Robert C. Wang, Shikui Kevin Chen 2023-04-11
11560135 Motor torque smoothing for recharging events on combustion engines Vijay Srinivasan 2023-01-24
11549455 Skip cylinder compression braking Steven E. Carlson, Mark A. Wilcutts, Vijay Srinivasan 2023-01-10
11492987 Cylinder charge trapping strategies based on predictive number of skips and staggered implementation of valvetrain dependent operational strategies for internal combustion engines Shikui Kevin Chen, Vijay Srinivasan, Elliott A. Ortiz-Soto, Matthew A. Younkins 2022-11-08
11434839 Use of machine learning for detecting cylinder intake and/or exhaust valve faults during operation of an internal combustion engine Shikui Kevin Chen, Aditya MANDAL, Xiaoping Cai 2022-09-06
11427177 Pulsed electric machine control using tables Paul Carvell 2022-08-30
11421613 Motor torque smoothing on combustion engines by approximating a periodic waveform using sinusoids Vijay Srinivasan 2022-08-23
11359562 Noise, vibration and harshness reduction in a skip fire engine control system Xin Yuan, John W. PARSELS, Mohammad R. Pirjaberi, Mark A. Wilcutts, Masaki Nagashima 2022-06-14
11352966 Deceleration cylinder cut-off Steven E. Carlson, Xin Yuan, Siamak Hashemi, Vijay Srinivasan, Srihari Kalluri +3 more 2022-06-07
11352967 Cylinder charge trapping strategies based on predictive number of skips and staggered implementation of valvetrain dependent operational strategies for internal combustion engines Shikui Kevin Chen, Vijay Srinivasan, Elliott A. Ortiz-Soto, Matthew A. Younkins 2022-06-07
11300026 Separately determining firing density and pumping density during firing density transitions for a lean-burn internal combustion engine Shikui Kevin Chen, Matthew A. Younkins 2022-04-12
11280276 Firing fraction management in skip fire engine control Mohammad R. Pirjaberi, Adya S. Tripathi 2022-03-22
11260844 Managing engine firing fraction changes Andrew W. Phillips, Xiaoping Cai 2022-03-01
11261807 Dynamic valve control in a skip fire controlled engine Jerry F. FUSCHETTO, Matthew A. Younkins, Ihab S. Soliman, Mark A. Wilcutts, Steven E. Carlson 2022-03-01
11236690 Engine cylinder output level modulation Yongyan Cao, Elliott A. Ortiz-Soto 2022-02-01
11208093 Motor torque smoothing for recharging events on combustion engines Vijay Srinivasan 2021-12-28
11208964 Engine torque smoothing Mohammad R. Pirjaberi, Kian EISAZADEH-FAR, Steven E. Carlson 2021-12-28
11143125 Motor torque smoothing on combustion engines by approximating a periodic waveform using sinusoids Vijay Srinivasan 2021-10-12