Granted Patent
Utility
US 6,031,902 · App. 09/032,917
Dealing communication system
Inventor:
Toshiei Takahashi
Patented Case
View Patent ↗
Granted: Feb 29, 2000
Filed: Mar 2, 1998
Inventor
Toshiei Takahashi
Assignee (at issue)
Hitachi Telecom Technologies, 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.