Granted Patent
Utility
US 5,889,284 · App. 08/965,513
Liquid level gauge having p-c board enclosed within probe
Inventor:
Donald J. Mattis
Patented Case
View Patent ↗
Granted: Mar 30, 1999
Filed: Nov 6, 1997
Inventor
Donald J. Mattis
Assignee (at issue)
CASCO PRODUCTS CORPORATION
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.