Granted Patent
Utility
US 5,469,261 · App. 08/301,260
Measurement of lens characteristics
Inventors:
Thomas Hellmuth, Charles E. Campbell, Jay Wei
Patented Case
View Patent ↗
Granted: Nov 21, 1995
Filed: Sep 6, 1994
Inventors
Thomas Hellmuth
Charles E. Campbell
Jay Wei
Assignee (at issue)
Carl Zeiss AG
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.