Granted Patent
Utility
US 6,598,472 · App. 10/316,057
Characteristics adjusting apparatus of physical quantity sensing device and a thermal type air flow measuring instrument, and associated adjusting method
Inventors:
Shinya Igarashi, Kaoru Uchiyama, Hitoshi Ishikawa
Patented Case
View Patent ↗
Granted: Jul 29, 2003
Filed: Dec 11, 2002
Inventors
Shinya Igarashi
Kaoru Uchiyama
Hitoshi Ishikawa
Assignees (at issue)
HITACHI, LTD.
HITACHI CAR ENGINEERING 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.