Granted Patent
Utility
US 6,643,065 · App. 09/765,876
Variable spacing diffraction grating
Inventor:
Donn M. Silberman
Patented Case
View Patent ↗
Granted: Nov 4, 2003
Filed: Jan 18, 2001
Inventor
Donn M. Silberman
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.