Granted Patent
Utility
US 6,538,825 · App. 09/908,896
Zoom lens
Inventor:
Chia-Shen Sun
Patented Case
View Patent ↗
Granted: Mar 25, 2003
Filed: Jul 20, 2001
Inventor
Chia-Shen Sun
Assignee (at issue)
Industrial Technology Research Institute
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.