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

Dan Duncan — 2 Patents

GE: 2 patents #13,632 of 36,430Top 40%
Schenectady, NY: #730 of 1,353 inventorsTop 55%
New York: #49,169 of 115,490 inventorsTop 45%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
Dan Duncan has been granted 2 US patents while listed as an inventor at GE. The first was granted in 1986 and the most recent in February 1987. Dan Duncan ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Dan Duncan in Schenectady, NY, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
4643645 Stage for a steam turbine Kenneth E. Robbins, Stephen G. Ruggles, John C. Williams, Stephen K. Tung, William James Sumner +1 more 1987-02-17 $10,011,000
4616975 Diaphragm for a steam turbine 1986-10-14 $10,608,000