Granted Patent
Utility
US 6,509,791 · App. 10/050,841
Switched capacitor filter circuit
Inventors:
Yuji Segawa, Asao Kokubo
Patented Case
View Patent ↗
Granted: Jan 21, 2003
Filed: Jan 18, 2002
Inventors
Yuji Segawa
Asao Kokubo
Assignee (at issue)
Fujitsu Limited
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.