Granted Patent
Utility
US 6,044,136 · App. 08/776,520
Telephone terminal and telephone exchange system accommodating the terminal
Inventors:
Toshie Takahashi, Takashi Sato
Patented Case
View Patent ↗
Granted: Mar 28, 2000
Filed: Feb 3, 1997
Inventors
Toshie Takahashi
Takashi Sato
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.