Granted Patent
Utility
US 6,476,566 · App. 09/750,388
Method and apparatus for canceling ripple current in a lamp
Inventor:
Henry Frazier Pruett
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: Dec 27, 2000
Inventor
Henry Frazier Pruett
Assignee (at issue)
InFocus Systems, Inc.
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.