Granted Patent
Utility
US 4,245,506 · App. 06/077,115
Porous membrane humidity sensor
Inventor:
William H. Meiklejohn
Patented Case
View Patent ↗
Granted: Jan 20, 1981
Filed: Sep 19, 1979
Inventor
William H. Meiklejohn
Assignee (at issue)
General Electric 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.