Granted Patent
Utility
US 5,939,850 · App. 09/132,074
Circuit for driving polyphase motor
Inventor:
Shunichi Kondoh
Patented Case
View Patent ↗
Granted: Aug 17, 1999
Filed: Aug 10, 1998
Inventor
Shunichi Kondoh
Assignees (at issue)
MITSUBISHI ELECTRIC CORPORATION
MITSUBISHI ELECTRIC ENGINEERING COMPANY, LIMITED
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.