Granted Patent
Utility
US 6,697,271 · App. 09/930,249
Cascaded multi-level H-bridge drive
Inventor:
Keith Corzine
Patented Case
View Patent ↗
Granted: Feb 24, 2004
Filed: Aug 16, 2001
Inventor
Keith Corzine
Assignee (at issue)
NORTHROP GRUMMAN CORPORATION
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.