Granted Patent
Utility
US 5,281,969 · App. 07/874,584
Noise shaper circuit
Inventor:
Yuichi Maruyama
Patented Case
View Patent ↗
Granted: Jan 25, 1994
Filed: Apr 24, 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.