Granted Patent
Utility
US 6,144,665 · App. 08/807,460
Subscriber network system
Inventor:
Satoru Karasawa
Patented Case
View Patent ↗
Granted: Nov 7, 2000
Filed: Feb 27, 1997
Inventor
Satoru Karasawa
Assignee (at issue)
OKI ELECTRIC INDUSTRY 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.