Granted Patent
Utility
US 4,634,421 · App. 06/759,545
Valve for incontinent patients
Inventor:
Manfred K. Hegemann
Patented Case
View Patent ↗
Granted: Jan 6, 1987
Filed: Jul 26, 1985
Inventor
Manfred K. Hegemann
Assignee (at issue)
Johnson & Johnson Products, 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.