Granted Patent
Utility
US 5,408,205 · App. 08/143,460
Ultrahigh accuracy digital programmable attenuator
Inventor:
Robert J. Blacka
Patented Case
View Patent ↗
Granted: Apr 18, 1995
Filed: Oct 26, 1993
Inventor
Robert J. Blacka
Assignee (at issue)
EMC Tech Co., Ltd.
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.