Granted Patent
Utility
US 4,799,489 · App. 07/124,835
Tonometer
Inventor:
Masayuki Hideshima
Patented Case
View Patent ↗
Granted: Jan 24, 1989
Filed: Nov 24, 1987
Inventor
Masayuki Hideshima
Assignee (at issue)
Tokyo Kogaku Kikai Kabushiki Kaisha
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.