Granted Patent
Utility
US 5,347,239 · App. 07/984,756
Step attenuator
Inventors:
Henry Loehner, Steven C. Zemke
Patented Case
View Patent ↗
Granted: Sep 13, 1994
Filed: Dec 3, 1992
Inventors
Henry Loehner
Steven C. Zemke
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.