Granted Patent
Utility
US 6,327,464 · App. 09/587,349
Frequency conversion circuit having a variable trap circuit tuned to the local oscillator frequency
Inventor:
Kenichi Hayasaka
Patented Case
View Patent ↗
Granted: Dec 4, 2001
Filed: Jun 5, 2000
Inventor
Kenichi Hayasaka
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.