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

Richard E. Duncan — 5 Patents

CUCummins: 3 patents #609 of 2,217Top 30%
Greenwood, IN: #152 of 649 inventorsTop 25%
Indiana: #7,193 of 33,936 inventorsTop 25%
Overall (All Time): #907,971 of 4,157,543Top 25%
5 Patents All Time
Richard E. Duncan has been granted 5 US patents while listed as an inventor at Cummins. The first was granted in 2003 and the most recent in March 2025. Richard E. Duncan ranks #907,971 of 4,157,543 US inventors in our database (top 21.8%). Patent records list Richard E. Duncan in Greenwood, IN, US.

Patents per Year

Patents granted per year, 2003 to 2025Bar chart with a peak of 2 patents in 2025.peak 22003: 1 patents20032023: 1 patents20232024: 1 patents20242025: 2 patents2025

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12247538 Adaptable barrels for fuel injection Eric A. Benham, Karthik Sethuraman 2025-03-11
12203457 Fuel pump assembly Donald J. Benson, Eric A. Benham 2025-01-21
12173675 Pump assemblies with barrel guiding features Eric A. Benham, Karthik Sethuraman, Donald J. Benson, Michael A. Lucas 2024-12-24 $31,151,000
11719207 Pump plunger assembly for improved pump efficiency Donald J. Benson, Bela Doszpoly, Eric A. Benham, Ahmad M. Sabri 2023-08-08 $32,833,000
D478021 Hanging Christmas tree Erin Theresa Duncan 2003-08-05