Granted Patent
Utility
US 5,457,989 · App. 08/267,017
Air flow surveying apparatus and method
Inventor:
Masahiko Minoshima
Patented Case
View Patent ↗
Granted: Oct 17, 1995
Filed: Jun 21, 1994
Inventor
Masahiko Minoshima
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.