Granted Patent
Utility
US 6,147,568 · App. 09/259,166
Radio-frequency variable attenuator
Inventor:
Viatcheslav Igor Souetinov
Patented Case
View Patent ↗
Granted: Nov 14, 2000
Filed: Feb 26, 1999
Inventor
Viatcheslav Igor Souetinov
Assignee (at issue)
Mitel Semiconductor 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.