Granted Patent
Utility
US 6,409,666 · App. 09/548,323
Tip end of ultrasonic endoscope
Inventor:
Keiji Ito
Patented Case
View Patent ↗
Granted: Jun 25, 2002
Filed: Apr 12, 2000
Inventor
Keiji Ito
Assignee (at issue)
Asahi Kogaku Kogyo Kabushiki Kaisha
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.