Granted Patent
Utility
US 5,830,139 · App. 08/707,508
Tonometer system for measuring intraocular pressure by applanation and/or indentation
Inventor:
Marcio Marc Abreu
Patented Case
View Patent ↗
Granted: Nov 3, 1998
Filed: Sep 4, 1996
Inventor
Marcio Marc Abreu
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.