Granted Patent
Utility
US 6,330,804 · App. 09/511,157
Refrigerating unit
Inventors:
Masaki Uno, Naoki Hattori
Patented Case
View Patent ↗
Granted: Dec 18, 2001
Filed: Feb 23, 2000
Inventors
Masaki Uno
Naoki Hattori
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.