Granted Patent
Utility
US 6,830,588 · App. 09/866,448
Artificial sphincter
Inventors:
Akihisa Furukawa, Toshiyuki Tagaki, Hidetoshi Matsuki, Yun Luo, Junko Hayashi, Tomoyuki Yambe, Takamichi Kamiyama, Shintaro Amae, Motoshi Wada
Patented Case
View Patent ↗
Granted: Dec 14, 2004
Filed: May 25, 2001
Inventors
Akihisa Furukawa
Toshiyuki Tagaki
Hidetoshi Matsuki
Yun Luo
Junko Hayashi
Tomoyuki Yambe
Takamichi Kamiyama
Shintaro Amae
Motoshi Wada
Assignees (at issue)
NEC TOKIN CORPORATION
Toshiyuki Tagaki
Yun Luo
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.