Granted Patent
Utility
US 5,983,656 · App. 09/072,141
Air conditioning system
Inventor:
Hiroshi Tokumasu
Patented Case
View Patent ↗
Granted: Nov 16, 1999
Filed: May 4, 1998
Inventor
Hiroshi Tokumasu
Assignee (at issue)
Zexel GmbH
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.