Granted Patent
Utility
US 6,256,147 · App. 07/612,369
Compensating layer to reduce wavefront errors in coatings on mirrors for optical systems
Inventor:
William John Davis
Patented Case
View Patent ↗
Granted: Jul 3, 2001
Filed: Nov 14, 1990
Inventor
William John Davis
Assignee (at issue)
B. F. Goodrich Company
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.