Granted Patent
Utility
US 6,644,247 · App. 10/002,648
Frequency switching systems for portable power modules
Inventor:
Edmund Campion
Patented Case
View Patent ↗
Granted: Nov 11, 2003
Filed: Oct 23, 2001
Inventor
Edmund Campion
Assignee (at issue)
General Electric 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.