Partial year: Data through Q3 2025 (Sept 30). Full-year totals not yet available.
TK

Tatsuya Kubo

Ricoh Company: 4 patents #25 of 689Top 4%
SI Sumitomo Rubber Industries: 2 patents #28 of 168Top 20%
Overall (2025): #14,501 of 469,880Top 4%
6
Patents 2025

Issued Patents 2025

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
12409971 Packing member, toner container, and packing method Shuntaroh Tamaki, Seiji Terazawa, Yosio Sano, Teruo Shibata 2025-09-09
12399448 Toner container and image forming apparatus Kentaro Nodera, Hideo Yoshizawa 2025-08-26
12286506 Organic sulfur material, electrode, and lithium-ion secondary batteries, and producing method Fumiya Chujo 2025-04-29
D1062861 Toner container Shuntaro Tamaki, Seiji Terazawa, Gen Kitamura, Hideo Yoshizawa 2025-02-18
12206107 Sulfur-based active material, electrode, non-aqueous electrolyte secondary battery and producing methods thereof Fumiya Chujo 2025-01-21
12189331 Positioning member, holding device, process cartridge, and image forming apparatus Kazuki Yogosawa, Yuuki Tsuchiya, Shinya Karasawa 2025-01-07