Granted Patent
Utility
US 4,763,025 · App. 06/837,754
Frequency discrimination circuit
Inventor:
Kunihiro Takeuchi
Patented Case
View Patent ↗
Granted: Aug 9, 1988
Filed: Mar 10, 1986
Inventor
Kunihiro Takeuchi
Assignee (at issue)
Diesel Kiki Co., Ltd.
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.