Granted Patent
Utility
US 4,588,264 · App. 06/551,842
Microscope objective lens
Inventor:
Yoshiyuki Shimizu
Patented Case
View Patent ↗
Granted: May 13, 1986
Filed: Nov 15, 1983
Inventor
Yoshiyuki Shimizu
Assignee (at issue)
Nippon Kogaku K.K.
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.