Granted Patent
Utility
US 5,442,448 · App. 08/215,022
Device for the laterally resolved investigation of a laterally heterogeneous ultrathin object layer
Inventor:
Wolfgang Knoll
Patented Case
View Patent ↗
Granted: Aug 15, 1995
Filed: Mar 21, 1994
Inventor
Wolfgang Knoll
Assignee (at issue)
Boehringer Mannheim GmbH
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.