Granted Patent
Utility
US 6,281,641 · App. 09/562,158
Electronic ballast for one or more lamps
Inventors:
Daoshen Chen, Bryce L. Hesterman
Patented Case
View Patent ↗
Granted: Aug 28, 2001
Filed: May 1, 2000
Inventors
Daoshen Chen
Bryce L. Hesterman
Assignee (at issue)
Universal Lighting Technologies 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.