Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Kouki Kojima — 9 Patents

Sumitomo Electric Industries: 8 patents #3,473 of 21,551Top 20%
REResonac: 1 patents #191 of 474Top 45%
Fukuoka, JP: #391 of 3,381 inventorsTop 15%
Overall (All Time): #535,341 of 4,157,543Top 15%
9 Patents All Time
Kouki Kojima has been granted 9 US patents while listed as an inventor at Sumitomo Electric Industries. The first was granted in 1994 and the most recent in December 2024. Kouki Kojima ranks #535,341 of 4,157,543 US inventors in our database (top 12.9%). Patent records list Kouki Kojima in Fukuoka, JP.

Patents per Year

Patents granted per year, 1994 to 2024Bar chart with a peak of 2 patents in 1999.peak 21994: 1 patents19941995: 1 patents19951996: 1 patents19961997: 1 patents19971999: 2 patents19992000: 1 patents20002004: 1 patents20042024: 1 patents2024

Issued Patents All Time

Showing 1–9 of 9 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12179257 Mold for continuous casting and method of manufacturing continuous casting rod 2024-12-31
6804186 Optical pickup of tilt control type Shogo Horinouchi 2004-10-12 $250,000
6084847 Light pickup Fuminobu Furukawa 2000-07-04
5986994 Light pickup of thin type Fuminobu Furukawa 1999-11-16 $185,000
5923636 Optical pickup Takashi Haruguchi, Kazuyuki Nakashima, Fuminobu Furukawa 1999-07-13 $370,000
5621716 Optical pickup having a transparent lens member with two reflecting surfaces Syougo Horinouchi 1997-04-15 $40,000
5566157 Optical pickup for information recording/reproducing apparatus having polygon prism, hologram, and grating lens Syougo Horinouchi 1996-10-15 $46,000
5422870 Optical pickup for information recording/reproducing apparatus Syougo Horinouchi 1995-06-06 $75,000
5377177 Optical pickup having first and second reflecting surfaces and hologram Syougo Horinouchi, Satoshi Kiyomatsu 1994-12-27 $91,000