Granted Patent
Utility
US 4,126,781 · App. 05/795,614
Method and apparatus for producing electrostatic fields by surface currents on resistive materials with applications to charged particle optics and energy analysis
Inventor:
Melvin W. Siegel
Patented Case
View Patent ↗
Granted: Nov 21, 1978
Filed: May 10, 1977
Inventor
Melvin W. Siegel
Assignee (at issue)
Extranuclear Laboratories, 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.