Granted Patent
Utility
US 4,666,256 · App. 06/717,798
Microscope objective lens
Inventors:
Yoshiyuki Shimizu, Takashi Mori
Patented Case
View Patent ↗
Granted: May 19, 1987
Filed: Mar 29, 1985
Inventors
Yoshiyuki Shimizu
Takashi Mori
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.