Granted Patent
Utility
US 3,982,821 · App. 05/464,385
Microscope objectives
Inventor:
Arthur H. Shoemaker
Patented Case
View Patent ↗
Granted: Sep 28, 1976
Filed: Apr 26, 1974
Inventor
Arthur H. Shoemaker
Assignee (at issue)
American Optical 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.