Granted Patent
Utility
US 5,086,494 · App. 07/624,850
Leak proof humidifier
Inventor:
Jui-Shang Wang
Patented Case
View Patent ↗
Granted: Feb 4, 1992
Filed: Dec 10, 1990
Inventor
Jui-Shang Wang
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.