Granted Patent
Utility
US 5,148,250 · App. 07/671,151
Bipolar transistor as protective element for integrated circuits
Inventors:
Josef Winnerl, Xaver Guggenmos
Patented Case
View Patent ↗
Granted: Sep 15, 1992
Filed: Mar 18, 1991
Inventors
Josef Winnerl
Xaver Guggenmos
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.