Granted Patent
Utility
US 4,980,604 · App. 07/370,215
Sheet-type dynode electron multiplier and photomultiplier tube comprising such dynodes
Inventor:
Pierre L'Hermite
Patented Case
View Patent ↗
Granted: Dec 25, 1990
Filed: Jun 22, 1989
Inventor
Pierre L'Hermite
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.