Granted Patent
Utility
US 6,014,254 · App. 08/803,827
Optical device for splitting an input beam into two orthogonal polarization states
Inventor:
Yihao Cheng
Patented Case
View Patent ↗
Granted: Jan 11, 2000
Filed: Feb 24, 1997
Inventor
Yihao 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.