Granted Patent
Utility
US 5,301,134 · App. 07/827,795
Digital filter circuit for use in oversampling type analog/digital converter
Inventor:
Yuichi Maruyama
Patented Case
View Patent ↗
Granted: Apr 5, 1994
Filed: Jan 30, 1992
Inventor
Yuichi Maruyama
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.