Granted Patent
Utility
US 4,384,485 · App. 06/120,699
Device for indicating liquid level
Inventors:
Terry N. Layton, Jack D. Merry, Frank N. Miller
Patented Case
View Patent ↗
Granted: May 24, 1983
Filed: Feb 11, 1980
Inventors
Terry N. Layton
Jack D. Merry
Frank N. Miller
Assignee (at issue)
The Kendall Company LP
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.