Granted Patent
Utility
US 4,745,929 · App. 07/013,309
Liquid drainage system with light emitters and detectors
Inventor:
Brian H. Silver
Patented Case
View Patent ↗
Granted: May 24, 1988
Filed: Feb 11, 1987
Inventor
Brian H. Silver
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.