Granted Patent
Utility
US 4,549,579 · App. 06/623,643
Straight-way valve
Inventor:
Konrad Bergmann
Patented Case
View Patent ↗
Granted: Oct 29, 1985
Filed: Jun 22, 1984
Inventor
Konrad Bergmann
Assignee (at issue)
American Standard 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.