Granted Patent
Utility
US 4,673,927 · App. 06/791,487
Apparatus for detecting and controlling the level of a gaseous fluid
Inventors:
Domenico Cianciavicchia, Stefano Franceschini
Patented Case
View Patent ↗
Granted: Jun 16, 1987
Filed: Oct 25, 1985
Inventors
Domenico Cianciavicchia
Stefano Franceschini
Assignee (at issue)
Hospal AG
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.