Granted Patent
Utility
US 6,489,792 · App. 09/558,231
Charge-up measuring apparatus
Inventor:
Shigeki Sakai
Patented Case
View Patent ↗
Granted: Dec 3, 2002
Filed: Apr 26, 2000
Inventor
Shigeki Sakai
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.