Granted Patent
Utility
US 6,492,238 · App. 09/887,310
Bipolar transistor with raised extrinsic base fabricated in an integrated BiCMOS circuit
Inventors:
David C. Ahlgren, Gregory G. Freeman, Feng-Yi Huang, Adam D. Ticknor
Patented Case
View Patent ↗
Granted: Dec 10, 2002
Filed: Jun 22, 2001
Inventors
David C. Ahlgren
Gregory G. Freeman
Feng-Yi Huang
Adam D. Ticknor
Assignee (at issue)
International Business Machines Corporation
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.