Granted Patent
Utility
US 6,801,648 · App. 09/778,614
Optical imaging system with symmetric optical probe
Inventor:
Xuefeng Cheng
Patented Case
View Patent ↗
Granted: Oct 5, 2004
Filed: Feb 6, 2001
Inventor
Xuefeng Cheng
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.