YA

Yuji Arai

Ricoh Company: 118 patents #21 of 9,818Top 1%
NS Nippon Steel: 30 patents #16 of 4,423Top 1%
TC Taiyo Yuden Co.: 18 patents #59 of 959Top 7%
NM Nippon Steel & Sumitomo Metal: 16 patents #15 of 1,491Top 2%
SI Sumitomo Metal Industries: 13 patents #12 of 1,462Top 1%
SO Sony: 5 patents #7,785 of 25,231Top 35%
NE Nec: 2 patents #5,510 of 14,502Top 40%
SC Sanyo Electric Co.: 1 patents #3,644 of 6,347Top 60%
NA Nanao: 1 patents #12 of 27Top 45%
UN Unknown: 1 patents #29,356 of 83,584Top 40%
UC Usui Co.: 1 patents #15 of 34Top 45%
Overall (All Time): #3,263 of 4,157,543Top 1%
202
Patents All Time

Issued Patents All Time

Showing 1–25 of 202 patents

Patent #TitleCo-InventorsDate
12305597 Steel pipe for fuel injection pipe, and fuel injection pipe using same Taizo Makino, Masahiro Yamazaki, Tomohiko Omura, Osamu Endo, Naoki Serizawa +1 more 2025-05-20
12188110 Steel material suitable for use in sour environment Shinji Yoshida, Kuniaki Itoh, Takuya OKAMURA 2025-01-07
12054798 Steel material and method for producing steel material Shinji Yoshida, Hiroki Kamitani, Yohei Otome 2024-08-06
11905580 Seamless steel pipe suitable for use in sour environment Hiroki Kamitani, Nobuaki Komatsubara, Seiya OKADA, Atsushi Soma, Shinji Yoshida 2024-02-20
11898216 Seamless steel pipe heat-treatment-finishing-treatment continuous facility Hiroki Kamitani, Takanori Tanaka, Atsushi Soma, Keiichi Kondo, Hideki MITSUNARI +3 more 2024-02-13
11891680 Steel material suitable for use in sour environment Yohei Otome, Hiroki Kamitani, Atsushi Soma, Taro OE, Nobuaki Komatsubara +1 more 2024-02-06
11773460 Steel pipe and method for producing steel pipe Shinji Yoshida, Atsushi Soma, Hiroki Kamitani 2023-10-03
11643712 Steel pipe and method for producing steel pipe Shinji Yoshida, Atsushi Soma, Hiroki Kamitani 2023-05-09
11492688 Steel material suitable for use in sour environment Shinji Yoshida 2022-11-08
11471923 Production method of seamless steel pipe Kouji Yamane, Kazuhiro Shimoda, Akihiro Sakamoto, Yasuhiko Daimon, Haruka Obe 2022-10-18
11473177 Steel material suitable for use in sour environment Shinji Yoshida 2022-10-18
11453925 Seamless steel pipe and method for producing same Takeshi Miki, Yusuke Mihara, Yohsuke Uchida, Masahiro Yamazaki, Masayuki Yamamoto 2022-09-27
11434554 Steel material suitable for use in sour environment Hiroki Kamitani, Atsushi Soma, Keiichi Kondo, Shinji Yoshida 2022-09-06
11332813 Steel material suitable for use in sour environment Shinji Yoshida, Atsushi Soma, Hiroki Kamitani 2022-05-17
11313005 Seamless steel pipe and method for producing the seamless steel pipe Atsushi Soma, Yosuke Tatebayashi, Keisuke Furo, Takenori Kuramoto, Hiroki Kamitani +1 more 2022-04-26
11174539 Steel material suitable for use in sour environment Hiroki Kamitani, Atsushi Soma, Shinji Yoshida, Seiya OKADA 2021-11-16
11155893 Steel material suitable for use in sour environment Shinji Yoshida, Atsushi Soma, Hiroki Kamitani 2021-10-26
11078558 Steel material, oil-well steel pipe, and method for producing steel material Shinji Yoshida, Atsushi Soma, Hiroki Kamitani 2021-08-03
11060160 Low-alloy steel for oil well pipe and method of manufacturing low-alloy steel oil well pipe Keiichi Kondo, Takanori Sato 2021-07-13
10988819 High-strength steel material and production method therefor Shinji Yoshida 2021-04-27
10752979 Low alloy oil-well steel pipe Keiichi Kondo 2020-08-25
10655200 Steel material and oil-well steel pipe Kengo Hata 2020-05-19
10563793 Low alloy oil-well steel pipe Keiichi Kondo 2020-02-18
10550962 Steel material and oil-well steel pipe 2020-02-04
10514564 Display unit Yasunobu Kawasaki, Yuki Takano, Hisanori Tsuboi 2019-12-24