Granted Patent
Utility
US 5,355,053 · App. 07/980,897
High pressure sodium lamp starting aid
Inventor:
Huiling Zhu
Patented Case
View Patent ↗
Granted: Oct 11, 1994
Filed: Nov 24, 1992
Inventor
Huiling Zhu
Assignee (at issue)
OSRAM SYLVANIA 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.