Granted Patent
Utility
US 4,650,296 · App. 06/794,547
Magnification changing mechanism of a microscope
Inventor:
Yukikazu Tsuchiya
Patented Case
View Patent ↗
Granted: Mar 17, 1987
Filed: Nov 4, 1985
Inventor
Yukikazu Tsuchiya
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.