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

John D. Gierszewski

Caterpillar: 4 patents #1,659 of 8,398Top 20%
Creve Coeur, IL: #3 of 15 inventorsTop 20%
Illinois: #21,447 of 84,256 inventorsTop 30%
Overall (All Time): #1,223,687 of 4,157,543Top 30%
4 Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
8342206 Dual butterfly control valve and method of use 2013-01-01
8281570 Reducing agent injector having purge heater Glenn B. Cox 2012-10-09
8046988 System having multiple valves operated by common controller Andrew C. Heebink 2011-11-01
7552584 Common engine and exhaust treatment fuel system Lifeng Wang, Rui Zhang, Curtis J. Graham, Andrew C. Heebink, Jack A. Merchant 2009-06-30