Granted Patent
Utility
US 5,909,367 · App. 08/867,035
Modular AC-AC variable voltage and variable frequency power conveter system and control
Inventor:
Jie Change
Patented Case
View Patent ↗
Granted: Jun 1, 1999
Filed: Jun 2, 1997
Inventor
Jie Change
Assignee (at issue)
Reliance Electric Industrial Company
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.