Granted Patent
Utility
US 5,323,731 · App. 07/993,812
Water filter gauge for coffee brewer
Inventor:
Thaddeus J. Kalowski
Patented Case
View Patent ↗
Granted: Jun 28, 1994
Filed: Dec 18, 1992
Inventor
Thaddeus J. Kalowski
Assignee (at issue)
Specialty Equipment Companies, 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.