Granted Patent
Utility
US 6,749,753 · App. 09/685,394
Filter of high accuracy
Inventors:
Osamu Yamaguchi, Shigenori Fukuda, Satoshi Ogata
Patented Case
View Patent ↗
Granted: Jun 15, 2004
Filed: Oct 10, 2000
Inventors
Osamu Yamaguchi
Shigenori Fukuda
Satoshi Ogata
Assignee (at issue)
Chisso 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.