Granted Patent
Utility
US 6,707,793 · App. 09/517,507
Button telephone apparatus and internet communication system
Inventor:
Hideo Yamashita
Patented Case
View Patent ↗
Granted: Mar 16, 2004
Filed: Mar 2, 2000
Inventor
Hideo Yamashita
Assignee (at issue)
NEC INFRONTIA CORPORATION
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.