Granted Patent
Utility
US 4,337,422 · App. 06/131,205
Field emission gun with noise compensation
Inventor:
Lee H. Veneklasen
Patented Case
View Patent ↗
Granted: Jun 29, 1982
Filed: Mar 17, 1980
Inventor
Lee H. Veneklasen
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.