Granted Patent
Utility
US 5,408,381 · App. 08/234,221
Capacitance humidity sensor
Inventors:
Paul E. Thoma, Carl F. Klein, Alexander M. Blok, Andrew Ralston
Patented Case
View Patent ↗
Granted: Apr 18, 1995
Filed: Apr 28, 1994
Inventors
Paul E. Thoma
Carl F. Klein
Alexander M. Blok
Andrew Ralston
Assignee (at issue)
Johnson Service Company
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.