Granted Patent
Utility
US 5,887,784 · App. 08/886,219
Desiccant device and humidity measuring means
Inventor:
Matthias Haas
Patented Case
View Patent ↗
Granted: Mar 30, 1999
Filed: Jul 1, 1997
Inventor
Matthias Haas
Assignee (at issue)
Electrowatt Technology Innovation 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.