Granted Patent
Utility
US 5,177,662 · App. 07/831,553
Capacitance humidity sensor
Inventor:
Paul E. Thoma
Patented Case
View Patent ↗
Granted: Jan 5, 1993
Filed: Feb 5, 1992
Inventor
Paul E. Thoma
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.