Granted Patent
Utility
US 5,141,889 · App. 07/715,864
Method of making enhanced insulated gate bipolar transistor
Inventors:
Lewis E. Terry, Stephen P. Robb, Robert E. Rutter
Patented Case
View Patent ↗
Granted: Aug 25, 1992
Filed: Jun 17, 1991
Inventors
Lewis E. Terry
Stephen P. Robb
Robert E. Rutter
Assignee (at issue)
Motorola, Inc.
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.