Granted Patent
Utility
US 6,167,722 · App. 09/258,301
Refrigeration unit
Inventors:
Minoru Kasezawa, Jun-ichi Hirohashi
Patented Case
View Patent ↗
Granted: Jan 2, 2001
Filed: Feb 26, 1999
Inventors
Minoru Kasezawa
Jun-ichi Hirohashi
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.