Granted Patent
Utility
US 4,674,494 · App. 06/732,680
Humidifying device
Inventor:
Virginia Wiencek
Patented Case
View Patent ↗
Granted: Jun 23, 1987
Filed: May 10, 1985
Inventor
Virginia Wiencek
Assignee (at issue)
The Kendall Company LP
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.