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USPTO Patent Rankings Data through Dec 31, 2025
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Roger E. Koepsel — 21 Patents

BRBrunswick: 21 patents #44 of 1,392Top 4%
Oshkosh, WI: #80 of 837 inventorsTop 10%
Wisconsin: #1,809 of 40,088 inventorsTop 5%
Overall (All Time): #201,324 of 4,157,543Top 5%
21 Patents All Time
Roger E. Koepsel has been granted 21 US patents while listed as an inventor at Brunswick. The first was granted in 1982 and the most recent in August 2025. Roger E. Koepsel ranks #201,324 of 4,157,543 US inventors in our database (top 4.8%). Patent records list Roger E. Koepsel in Oshkosh, WI, US.

Issued Patents All Time

Showing 1–21 of 21 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12391353 Marine drives and methods of making marine drives so as to minimize deleterious effects of cavitation John O. Scherer, III, Andrew Gunderson 2025-08-19
11981411 Marine drives and methods of making marine drives so as to minimize deleterious effects of cavitation John O. Scherer, III, Andrew Gunderson 2024-05-14 $17,717,000
11713102 Marine drives and methods of making marine drives so as to minimize deleterious effects of cavitation John O. Scherer, III, Andrew Gunderson 2023-08-01 $38,541,000
11459074 Marine drives and methods of making marine drives so as to minimize deleterious effects of cavitation John O. Scherer, III, Andrew Gunderson 2022-10-04 $9,088,000
9745948 Marine propeller and method of design thereof 2017-08-29 $12,348,000
7637722 Marine propeller David Dewitt, Jeremy L. Alby 2009-12-29 $11,562,000
7086836 Dual rate torque transmitting device for a marine propeller Mitesh B. Sheth, Michael P. Mihelich, John A. Tuchscherer, Daniel J. Schlagenhaft 2006-08-08 $18,990,000
6340290 Controllable pitch propeller with a fail safe increased pitch movement Carl Gerard Schott 2002-01-22 $7,883,000
6068529 Marine propulsion unit with dual water inlet structure Robert B. Weronke, Michael A. Karls, Donald F. Harry 2000-05-30 $5,112,000
5902160 Twin propeller marine propulsion unit Robert B. Weronke, Michael A. Karls, Donald F. Harry 1999-05-11 $11,084,000
5791950 Twin propeller marine propulsion unit Robert B. Weronke, Michael A. Karls, Donald F. Harry 1998-08-11 $2,018,000
5290147 Variable pitch marine propeller with shift biasing and synchronizing mechanism Michael A. Karls, Ronald M. Steiner 1994-03-01 $8,651,000
5236310 Marine propeller with performance pitch, including five blade version Ronald M. Steiner 1993-08-17 $3,633,000
5219272 Variable pitch marine propeller with hydrodynamic shifting Ronald M. Steiner, Michael A. Karls 1993-06-15 $9,938,000
5104292 Marine propeller with performance pitch, including five blade version Ronald M. Steiner 1992-04-14 $4,578,000
D319210 Five blade marine propeller John E. Duprey, Edward M. Thull 1991-08-20
4993151 Method of making an easily removed marine propeller Ronald M. Steiner, Hubert S. Gilgenbach, Terence C. Reinke 1991-02-19 $12,972,000
4925369 Easily removed marine propeller Ronald M. Steiner, Hubert S. Gilgenbach, Terence C. Reinke 1990-05-15 $1,161,000
4897061 Gearcase exhaust vent for a marine propulsion system Ronald M. Steiner 1990-01-30 $1,443,000
4789303 Marine propeller carry handle and emergency spare kit Michael E. Frazzell, William J. Gius 1988-12-06 $6,211,000
4331429 Symmetrical propeller Ronald M. Steiner, Daniel G. Wilcox 1982-05-25 $635,000