Granted Patent
Utility
US 4,697,619 · App. 06/830,512
Solenoid valve having a power amplifier
Inventor:
Edelbert Tiefenthaler
Patented Case
View Patent ↗
Granted: Oct 6, 1987
Filed: Feb 14, 1986
Inventor
Edelbert Tiefenthaler
Assignee (at issue)
Sulzer Brothers 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.