Granted Patent
Utility
US 5,883,982 · App. 08/816,837
Astigmatism measurement apparatus and method based on a focal plane separation measurement
Inventors:
James K. Riley, Keith L. Frost, William C. Lindow, Kim Hansen, Tuan Phan, James Stephanick
Patented Case
View Patent ↗
Granted: Mar 16, 1999
Filed: Mar 13, 1997
Inventors
James K. Riley
Keith L. Frost
William C. Lindow
Kim Hansen
Tuan Phan
James Stephanick
Assignee (at issue)
Neopath, Inc.
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.