RT

Ryuichi Toba

DC Dowa Electronics Materials Co.: 15 patents #8 of 241Top 4%
WA Wavesquare: 9 patents #2 of 7Top 30%
DC Dowa Mining Co.: 5 patents #22 of 324Top 7%
DC Dowa Holdings Co.: 3 patents #7 of 77Top 10%
Nissan Motor Co.: 1 patents #4,519 of 8,689Top 55%
Overall (All Time): #190,156 of 4,157,543Top 5%
22
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
12349473 Ultraviolet light receiving device Yasuhiro Watanabe 2025-07-01
9537053 III nitride semiconductor device and method of manufacturing the same Meoung Whan Cho, Seog Woo Lee, Yoshitaka Kadowaki 2017-01-03
9502603 Vertically structured group III nitride semiconductor LED chip and method for manufacturing the same Meoung Whan Cho, Seog Woo Lee, Pil Guk Jang, Yoshitaka Kadowaki 2016-11-22
9184338 Semiconductor device and method of manufacturing the same Meoung Whan Cho, Seog Woo Lee, Yoshitaka Kadowaki 2015-11-10
9012935 Vertically structured group III nitride semiconductor LED chip and method for manufacturing the same Meoung Whan Cho, Seog Woo Lee, Pil Guk Jang, Tatsunori Toyota, Yoshitaka Kadowaki 2015-04-21
8963290 Semiconductor device and manufacturing method therefor Yoshitaka Kadowaki, Meoung Whan Cho, Seog Woo Lee, Pil Guk Jang 2015-02-24
8962362 Vertically structured group III nitride semiconductor LED chip and method for manufacturing the same Meoung Whan Cho, Seog Woo Lee, Pil Guk Jang, Tatsunori Toyota, Yoshitaka Kadowaki 2015-02-24
8921227 Semiconductor device assembly and semiconductor device and method of manufacturing the same 2014-12-30
8878189 Group III nitride semiconductor growth substrate, group III nitride semiconductor epitaxial substrate, group III nitride semiconductor element and group III nitride semiconductor free-standing substrate, and method of producing the same Masahito Miyashita, Tatsunori Toyota, Yoshitaka Kadowaki 2014-11-04
D711582 Lighting element Meoung Whan Cho, Seog Woo Lee, Yoshitaka Kadowaki 2014-08-19
D711581 Lighting element Meoung Whan Cho, Seog Woo Lee, Yoshitaka Kadowaki 2014-08-19
D711583 Lighting element Meoung Whan Cho, Seog Woo Lee, Yoshitaka Kadowaki 2014-08-19
8736025 III-nitride semiconductor growth substrate, III-nitride semiconductor epitaxial substrate, III-nitride semiconductor element, III-nitride semiconductor freestanding substrate all having improved crystallinity Masahito Miyashita, Tatsunori Toyota 2014-05-27
D703863 Lighting elements Meoung Whan Cho, Seog Woo Lee, Yoshitaka Kadowaki 2014-04-29
D703862 Lighting elements Meoung Whan Cho, Seog Woo Lee, Yoshitaka Kadowaki 2014-04-29
8216869 Group III nitride semiconductor and a manufacturing method thereof Takafumi Yao, Meoung Whan Cho 2012-07-10
7256477 Notched compound semiconductor wafer Naoya Sunachi 2007-08-14
7256476 Notched compound semiconductor wafer Naoya Sunachi 2007-08-14
7256478 Notched compound semiconductor wafer Naoya Sunachi 2007-08-14
6998700 Notched compound semiconductor wafer Naoya Sunachi 2006-02-14
6450567 Structure of rear portion of automotive vehicle body Atsushi Hanyu 2002-09-17
6336970 Surface preparation method and semiconductor device Ryo Sakamoto, Hiroyuki Ikeda 2002-01-08