Granted Patent
Utility
US 4,637,434 · App. 06/742,259
Three-way valve for an attenuator
Inventor:
Carl J. Moen
Patented Case
View Patent ↗
Granted: Jan 20, 1987
Filed: Jun 7, 1985
Inventor
Carl J. Moen
Assignee (at issue)
Beloit Corporation
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.