Granted Patent
Utility
US 5,843,819 · App. 08/898,514
Semiconductor memory device with trench capacitor and method for the production thereof
Inventors:
Walter Kellner, Karl-Heinz Kusters, Wolfgang Muller, Franz-Xaver Stelz
Patented Case
View Patent ↗
Granted: Dec 1, 1998
Filed: Jul 22, 1997
Inventors
Walter Kellner
Karl-Heinz Kusters
Wolfgang Muller
Franz-Xaver Stelz
Assignee (at issue)
Siemens Aktiengesellschaft
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.