Kenji Ishizuka has been granted 11 US patents while listed as an inventor at Yamaha . The first was granted in 2004 and the most recent in October 2025. Kenji Ishizuka ranks #435,149 of 4,157,543 US inventors in our database (top 10.5%). Patent records list Kenji Ishizuka in Yokohama, JP.
Patents per Year Patents granted per year, 2004 to 2024 Bar chart with a peak of 4 patents in 2024. peak 4 2004: 1 patents 2004 2005: 1 patents 2005 2006: 1 patents 2006 2020: 1 patents 2020 2022: 2 patents 2022 2024: 4 patents 2024 Issued Patents All Time
Showing 1–11 of 11 patents
Patent # Title Co-Inventors Date
12451583 Power splitter and communication apparatus Satoshi Shigematsu 2025-10-21
12041430 Control method, control system, and storage medium Kenichi Tamiya 2024-07-16
11894858 A/D conversion device and A/D conversion method — 2024-02-06
11877128 Audio signal processing method, apparatus, and program — 2024-01-16
11871191 Method and device for controlling fir filter Hiroomi Shidoji , Kenichi Tamiya 2024-01-09
11528557 Method and device for controlling FIR filter — 2022-12-13
11228836 System for implementing filter control, filter controlling method, and frequency characteristics controlling method Kenichi Tamiya , Takashi Mita , Shinichiro Kaneko 2022-01-18
10728663 Method and apparatus for setting filter frequency response Kenichi Tamiya , Kazunobu Kondo , Toshifumi Kunimoto 2020-07-28
7079432 Semiconductor storage device formed to optimize test technique and redundancy technology Daisuke Kato , Takashi Taira , Yohji Watanabe , Munehiro Yoshida 2006-07-18
6876588 Semiconductor storage device formed to optimize test technique and redundancy technology Daisuke Kato , Takashi Taira , Yohji Watanabe , Munehiro Yoshida 2005-04-05
6741509 Semiconductor storage device formed to optimize test technique and redundancy technology Daisuke Kato , Takashi Taira , Yohji Watanabe 2004-05-25
