Granted Patent
Utility
US 5,828,064 · App. 08/693,616
Field emission environmental scanning electron microscope
Inventor:
W. Ralph Knowles
Patented Case
View Patent ↗
Granted: Oct 27, 1998
Filed: Aug 7, 1996
Inventor
W. Ralph Knowles
Assignee (at issue)
Philips Electronics North America 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.