Granted Patent
Utility
US 6,693,701 · App. 09/867,036
Method and apparatus for diffractive transfer of a mask grating
Inventor:
Poul Erik Hansen
Patented Case
View Patent ↗
Granted: Feb 17, 2004
Filed: May 29, 2001
Inventor
Poul Erik Hansen
Assignee (at issue)
Ibsen Photonics A/S
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.