Granted Patent
Utility
US 6,420,838 · App. 09/801,496
Fluorescent lamp ballast with integrated circuit
Inventor:
Peter W. Shackle
Patented Case
View Patent ↗
Granted: Jul 16, 2002
Filed: Mar 8, 2001
Inventor
Peter W. Shackle
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.