Granted Patent
Utility
US 5,654,798 · App. 08/483,737
Interferometric measurement of surfaces with diffractive optics at grazing incidence
Inventor:
John H. Bruning
Patented Case
View Patent ↗
Granted: Aug 5, 1997
Filed: Jun 7, 1995
Inventor
John H. Bruning
Assignee (at issue)
Tropel Corporation
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.