Granted Patent
Utility
US 5,362,964 · App. 08/100,545
Environmental scanning electron microscope
Inventors:
W. Ralph Knowles, William G. Schultz, Allen E. Armstrong
Patented Case
View Patent ↗
Granted: Nov 8, 1994
Filed: Jul 30, 1993
Inventors
W. Ralph Knowles
William G. Schultz
Allen E. Armstrong
Assignee (at issue)
ElectroScan 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.