Granted Patent
Utility
US 5,162,983 · App. 07/727,602
Active filter device for suppressing harmonics in a system including a capacitive load
Inventor:
Takeshi Kumagai
Patented Case
View Patent ↗
Granted: Nov 10, 1992
Filed: Jul 9, 1991
Inventor
Takeshi Kumagai
Assignee (at issue)
MITSUBISHI ELECTRIC 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.