Granted Patent
Utility
US 6,184,740 · App. 09/357,240
Control Circuit
Inventor:
Erkki Miettinen
Patented Case
View Patent ↗
Granted: Feb 6, 2001
Filed: Jul 19, 1999
Inventor
Erkki Miettinen
Assignee (at issue)
ABB Industry Oy
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.