Granted Patent
Utility
US 6,696,793 · App. 10/294,813
Ion source
Inventor:
Takatoshi Yamashita
Patented Case
View Patent ↗
Granted: Feb 24, 2004
Filed: Nov 15, 2002
Inventor
Takatoshi Yamashita
Assignee (at issue)
NISSIN ELECTRIC CO., LTD.
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.