Granted Patent
Utility
US 6,764,439 · App. 09/902,850
Device for improving drainage of the aqueous humor within the eye of a living being
Inventors:
Hansgeorg Schaaf, Robert Stegmann, Werner Maag
Patented Case
View Patent ↗
Granted: Jul 20, 2004
Filed: Jul 11, 2001
Inventors
Hansgeorg Schaaf
Robert Stegmann
Werner Maag
Assignee (at issue)
Grieshaber & Co. AG Schaffhausen
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.