Granted Patent
Utility
US 6,028,405 · App. 09/045,333
Variable frequency drive noise attenuation circuit
Inventors:
Tsuneo Kume, Mahesh M. Swamy
Patented Case
View Patent ↗
Granted: Feb 22, 2000
Filed: Mar 2, 1998
Inventors
Tsuneo Kume
Mahesh M. Swamy
Assignee (at issue)
Yaskawa Electric America, 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.