Granted Patent
Utility
US 6,522,229 · App. 09/969,103
Transformer
Inventors:
Sakari Laine, Kari Seppanen, Timo Rintamäki
Patented Case
View Patent ↗
Granted: Feb 18, 2003
Filed: Oct 3, 2001
Inventors
Sakari Laine
Kari Seppanen
Timo Rintamäki
Assignee (at issue)
ABB TECHNOLOGY AG
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.