Granted Patent
Utility
US 4,649,314 · App. 06/628,704
Electron multiplier element, electron multiplier device comprising said multiplying element, and the application to a photomultiplier tube
Inventor:
Gilbert Eschard
Patented Case
View Patent ↗
Granted: Mar 10, 1987
Filed: Jul 9, 1984
Inventor
Gilbert Eschard
Assignee (at issue)
U.S. Philips 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.