Granted Patent
Utility
US 6,151,903 · App. 09/333,968
Air conditioning apparatus and air conditioning method for reducing electric power consumption by reducing pressure loss in circulation air
Inventor:
Takanori Hironaka
Patented Case
View Patent ↗
Granted: Nov 28, 2000
Filed: Jun 16, 1999
Inventor
Takanori Hironaka
Assignee (at issue)
NEC CORPORATION
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.