Granted Patent
Utility
US 4,411,158 · App. 06/254,114
Apparatus for sensing the condition of a fluid
Inventor:
Alfred Schaff, Jr.
Patented Case
View Patent ↗
Granted: Oct 25, 1983
Filed: Apr 14, 1981
Inventor
Alfred Schaff, Jr.
Assignee (at issue)
Ametek, Inc.
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.