Granted Patent
Utility
US 5,342,293 · App. 08/081,435
Variable vacuum/variable flow phacoemulsification method
Inventor:
Frank Zanger
Patented Case
View Patent ↗
Granted: Aug 30, 1994
Filed: Jun 22, 1993
Inventor
Frank Zanger
Assignee (at issue)
Allergan, 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.