Granted Patent
Utility
US 6,215,330 · App. 09/330,553
Differential diode transistor logic (DDTL) circuit enhancements
Inventor:
Johannes K. Notthoff
Patented Case
View Patent ↗
Granted: Apr 10, 2001
Filed: Jun 11, 1999
Inventor
Johannes K. Notthoff
Assignee (at issue)
TRW Limited
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.