Granted Patent
Utility
US 6,301,909 · App. 09/709,849
Automotive dual air-conditioning system
Inventor:
Satoshi Hayasaka
Patented Case
View Patent ↗
Granted: Oct 16, 2001
Filed: Nov 10, 2000
Inventor
Satoshi Hayasaka
Assignee (at issue)
ALPS ELECTRIC CO., 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.