Granted Patent
Utility
US 5,948,989 · App. 08/989,866
Pressure sensor device
Inventors:
Junichi Ichikawa, Etsuo Nishimura
Patented Case
View Patent ↗
Granted: Sep 7, 1999
Filed: Dec 12, 1997
Inventors
Junichi Ichikawa
Etsuo Nishimura
Assignee (at issue)
MITSUBISHI ELECTRIC 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.