Granted Patent
Utility
US 5,923,425 · App. 08/975,145
Grazing incidence interferometry for measuring transparent plane-parallel plates
Inventors:
Paul G. Dewa, Andrew W. Kulawiec
Patented Case
View Patent ↗
Granted: Jul 13, 1999
Filed: Nov 20, 1997
Inventors
Paul G. Dewa
Andrew W. Kulawiec
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.