Granted Patent
Utility
US 6,618,368 · App. 09/252,283
Data gateway and method for relaying data
Inventors:
Keiko Tanigawa, Koji Tsukada, Toru Hoshi, Hiroshi Kanai, Toshimitsu Hayashi
Patented Case
View Patent ↗
Granted: Sep 9, 2003
Filed: Feb 18, 1999
Inventors
Keiko Tanigawa
Koji Tsukada
Toru Hoshi
Hiroshi Kanai
Toshimitsu Hayashi
Assignee (at issue)
HITACHI, 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.