Granted Patent
Utility
US 4,882,487 · App. 07/268,440
Direct imaging monochromatic electron microscope
Inventor:
Robert L. Gerlach
Patented Case
View Patent ↗
Granted: Nov 21, 1989
Filed: Nov 8, 1988
Inventor
Robert L. Gerlach
Assignee (at issue)
PerkinElmer, Inc.
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.