Granted Patent
Utility
US 5,228,107 · App. 07/921,531
Humidifier with safety shutoff
Inventor:
Frank Marino
Patented Case
View Patent ↗
Granted: Jul 13, 1993
Filed: Jul 29, 1992
Inventor
Frank Marino
Assignee (at issue)
Duracraft Corp.
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.