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

Curtis D. Leaf — 4 Patents

ONOnan: 4 patents #4 of 81Top 5%
Minneapolis, MN: #1,608 of 6,114 inventorsTop 30%
Minnesota: #16,016 of 52,454 inventorsTop 35%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
Curtis D. Leaf has been granted 4 US patents while listed as an inventor at Onan. The first was granted in 1992 and the most recent in April 1996. Curtis D. Leaf ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Curtis D. Leaf in Minneapolis, MN, US.

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
5509393 Vacuum lockoff apparatus and method Larry N. Drozdik, John Hughes, Anthony T. Klejeski 1996-04-23 $11,275,000
5193501 Method for assembling and preloading shaft assemblies in reciprocating internal combustion engines Anthony T. Klejeski, James I. R. Butcher 1993-03-16 $11,268,000
D331929 Shroud for an internal combustion engine Richard L. Hollar 1992-12-22
5165376 Tapered governor arm/governor shaft joint Anthony T. Klejeski 1992-11-24 $2,912,000