Granted Patent
Utility
US 6,515,601 · App. 09/929,171
Noise shaper
Inventors:
Yukio Fukuhara, Akira Toyama
Patented Case
View Patent ↗
Granted: Feb 4, 2003
Filed: Aug 14, 2001
Inventors
Yukio Fukuhara
Akira Toyama
Assignee (at issue)
Nippon Precision Circuits Inc.
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.