Granted Patent
Utility
US 4,804,376 · App. 07/126,334
Annular reflux indicator for a urine collection bag
Inventor:
Terry N. Layton
Patented Case
View Patent ↗
Granted: Feb 14, 1989
Filed: Nov 30, 1987
Inventor
Terry N. Layton
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.