Granted Patent
Utility
US 5,939,739 · App. 08/866,478
Separation of thermal and electrical paths in flip chip ballasted power heterojunction bipolar transistors
Inventor:
Matthew Francis O'Keefe
Patented Case
View Patent ↗
Granted: Aug 17, 1999
Filed: May 30, 1997
Inventor
Matthew Francis O'Keefe
Assignee (at issue)
Whitaker & Company
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.