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

Keizo Kyuda — 2 Patents

UNUnitika: 2 patents #136 of 620Top 25%
NSNippon Steel: 1 patents #2,111 of 4,423Top 50%
NCNippon Steel Chemical Co.: 1 patents #136 of 380Top 40%
Kyoto, JP: #6,047 of 11,909 inventorsTop 55%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
Keizo Kyuda has been granted 2 US patents while listed as an inventor at Unitika. The first was granted in 1993 and the most recent in May 1994. Keizo Kyuda ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Keizo Kyuda in Kyoto, JP.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5314954 Process for preparing aromatic polyester-polystyrene block copolymers Hiroshi Ohishi, Shinji Inaba, Masao Kimura, Koichi Fujishiro, Masanao Kawabe +4 more 1994-05-24
5245004 Anhydrous polymerization of caprolactam with catalyst, cocatalyst and activator Kazushige Kojima, Mitsunobu Satoh, Takaaki Matsuo 1993-09-14