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USPTO Patent Rankings Data through Dec 31, 2025
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Jun Takehara — 14 Patents

APApi: 7 patents #5 of 76Top 7%
MCMitsubishi Chemical: 4 patents #545 of 3,022Top 20%
NCNkk Co.: 2 patents #309 of 1,173Top 30%
TITakasago International: 2 patents #166 of 465Top 40%
JTJapan Science And Technology: 2 patents #95 of 836Top 15%
UBUbe: 1 patents #15 of 72Top 25%
APAsahi Kasei Pharma: 1 patents #59 of 115Top 55%
ACAsahi Kasei Kogyo Co.: 1 patents #565 of 1,395Top 45%
TITakeda Chemical Industries: 1 patents #745 of 1,420Top 55%
TLTakeda Pharmaceutical Company Limited: 1 patents #859 of 1,531Top 60%
Tokyo, JP: #11,195 of 90,295 inventorsTop 15%
Overall (All Time): #332,869 of 4,157,543Top 9%
14 Patents All Time
Jun Takehara has been granted 14 US patents while listed as an inventor at Api. The first was granted in 1998 and the most recent in April 2025. Jun Takehara ranks #332,869 of 4,157,543 US inventors in our database (top 8.0%). Patent records list Jun Takehara in Tokyo, JP.

Issued Patents All Time

Showing 1–14 of 14 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12281074 Method for producing amino acid derivatives Masato MURAI, Daiki Okado 2025-04-22
12202800 Method for producing amino acid derivatives Masato MURAI, Daiki Okado 2025-01-21
11897844 Method for producing amino acid derivatives Masato MURAI, Daiki Okado 2024-02-13
10703719 Method for producing 5-hydroxypiperidine-2-carboxylic acid Masato MURAI, Takashi Ohtani, Tomoko Maeda, Tsugihiko Hidaka 2020-07-07
10370330 Method for producing 5-hydroxypiperidine-2-carboxylic acid Masato MURAI, Takashi Ohtani, Tomoko Maeda, Tsugihiko Hidaka 2019-08-06
9988351 Method for producing 5-hydroxypiperidine-2-carboxylic acid Masato MURAI, Takashi Ohtani, Tomoko Maeda, Tsugihiko Hidaka 2018-06-05
9790181 Method for producing 5-hydroxypiperidine-2-carboxylic acid Masato MURAI, Takashi Ohtani, Tomoko Maeda, Tsugihiko Hidaka 2017-10-17
9061991 Method for producing 1-amino-1-alkoxycarbonyl-2-vinylcyclopropane Yuuki Asuma, Tatsuya Suzuki, Tsugihiko Hidaka, Kuniko Asada, Ryoma Miyake +2 more 2015-06-23
7659409 3-Hydroxy-3-(2-thienyl) propionamides and production method thereof, and production method of 3-amino-1-(2-thienyl)-1-propanols using the same Jingping QU, Kazuaki Kanno, Hiroshi Kawabata, Yasumasa Dekishima, Makoto Ueda +6 more 2010-02-09 $799,000
6887820 Method for producing optically active compounds Takao Ikariya, Shohei Hashiguchi, Nobuyuki Uematsu, Kazuhiko Matsumura, Ryoji Noyori +1 more 2005-05-03
6531594 Process for producing 1H-3-aminopyrrolidine and derivatives thereof Michi Watanabe, Takeshi Nakato, Kazuaki Kanno, Shuji Ichikawa 2003-03-11
6184381 Process for preparing optically active compounds Takao Ikariya, Shohei Hashiguchi, Nobuyuki Uematsu, Kazuhiko Matsumura, Ryoji Noyori +1 more 2001-02-06
6077971 Method for purifying homocystine Shuji Ichikawa, Hiroshi Iwane, Hirotaka Ryutou, Kenichi Sugimoto, Toshihiko Yahata 2000-06-20
5847205 Method for producing homocystine Shuji Ichikawa, Hiroshi Iwane 1998-12-08

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Gwangjae Jeon14
Masao Zen14
Yoshihiro YAMASAKI14
Sanjay Vakil14
Samuel Bartlett14
Taketoshi Okuno14