Granted Patent
Utility
US 6,553,774 · App. 09/508,115
Self-diagnosing apparatus for refrigerator
Inventors:
Haruyuki Ishio, Osamu Yamamoto
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: Mar 20, 2000
Inventors
Haruyuki Ishio
Osamu Yamamoto
Assignee (at issue)
Matsushita Refrigeration Company
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.