TK

Toshio Kumagai

L( Lederle (Japan): 8 patents #1 of 49Top 3%
Pfizer: 1 patents #3,022 of 5,153Top 60%
📍 Shiki, JP: #28 of 163 inventorsTop 20%
Overall (All Time): #589,377 of 4,157,543Top 15%
9
Patents All Time

Issued Patents All Time

Showing 1–9 of 9 patents

Patent #TitleCo-InventorsDate
6080755 1,9-diazabicyclo[4.3.0]nona-3,8-diene derivatives Hiroshi Matsunaga, Souiti Kaneda, Hisashi Shimidzu, Yoshiyuki Shikata 2000-06-27
5886172 Carbapenem-3-carboxylic acid ester derivatives Takao Abe 1999-03-23
5783703 Sulfur-containing compounds method for their use and prodction Kazuhiko Hayashi, Chisato Sato, Satoshi Tamai, Takao Abe, Takeshi Isoda +1 more 1998-07-21
5679790 2-1-(1,3-thiazolin-2-yl)azetidin-3-yl!thio-carbapenem derivatives Takao Abe, Takeshi Isoda, Chisato Sato, Ado Mihira, Satoshi Tamai 1997-10-21
5534510 2-[1-(1,3-thiazolin-2-yl)azetidin-3-yl]thio-carbapenem derivatives Takao Abe, Takeshi Isoda, Chisato Sato, Ado Mihira, Satoshi Tamai 1996-07-09
4925836 Antibacterially effective methods and compositions based upon (1R,5S,6S)-2-[(6,7-dihydro-5H-pyrazolo[1,2-a][1,2,4]triazolium-6-yl)]thi o-6-[R-1-hydroxyethyl]-1-methyl-carbapenem-3-caroxylate and salts therefore Hiroshi Matsunaga, Yoshisuke Machida, Yunosuke Nagase, Muneo Hikida, Yoshimitsu Nagao 1990-05-15
4925935 Methods for the manufacture of (1R,5S,6S)-2-[(6,7-dihydro-5H-pyrazolo[1,2-a][1,2,4]triazolium-6-yl]thio -6-[R-1-hydroxyethyl]-1-methyl-carbapenem-3-carboxylate Hiroshi Matsunaga, Yoshisuke Machida, Yunosuke Nagase, Muneo Hikida, Yoshimitsu Nagao 1990-05-15
4918184 Azetidin-2-one derivatives, and process for production thereof using tin enolates Yoshimitsu Nagao, Satoshi Tamai, Yasuhiro Kuramoto, Hisashi Shimidzu 1990-04-17
4866171 (1R,5S,6S)-2-[(6,7-dihydr o-5H-pyrazolo[1,2-a][1,2,4]triazolium-6-yl)]thio-6-[R-1-hydroxyethyl]-1-m ethyl-carbapenum-3-carboxylate Hiroshi Matsunaga, Yoshisuke Machida, Yunosuke Nagase, Muneo Hikida, Yoshimitsu Nagao 1989-09-12