Granted Patent
Utility
US 5,909,151 · App. 08/769,578
Ring oscillator circuit
Inventor:
Oskar Leuthold
Patented Case
View Patent ↗
Granted: Jun 1, 1999
Filed: Dec 19, 1996
Inventor
Oskar Leuthold
Assignee (at issue)
Mitel Semiconductor Americas 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.