Granted Patent
Utility
US 5,042,484 · App. 07/257,368
Air puff type tonometer
Inventor:
Masayuki Hideshima
Patented Case
View Patent ↗
Granted: Aug 27, 1991
Filed: Oct 13, 1988
Inventor
Masayuki Hideshima
Assignee (at issue)
TOPCON CORPORATION
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.