Granted Patent
Utility
US 6,377,749 · App. 09/900,990
Hairdryer with concentric nozzles
Inventor:
Shingo Ohmura
Patented Case
View Patent ↗
Granted: Apr 23, 2002
Filed: Jul 9, 2001
Inventor
Shingo Ohmura
Assignee (at issue)
Matsushita Electric Works, 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.