Granted Patent
Utility
US 5,436,475 · App. 08/246,481
Bipolar transistor for high power in the microwave range
Inventors:
Helmut Tews, Hans-Peter Zwicknagl
Patented Case
View Patent ↗
Granted: Jul 25, 1995
Filed: May 19, 1994
Inventors
Helmut Tews
Hans-Peter Zwicknagl
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.