Granted Patent
Utility
US 5,173,838 · App. 07/600,444
Electrical operational unit, particularly for data technology
Inventor:
Hermann Wessely
Patented Case
View Patent ↗
Granted: Dec 22, 1992
Filed: Oct 19, 1990
Inventor
Hermann Wessely
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.