Granted Patent
Utility
US 4,540,415 · App. 06/400,553
Disposable diaper with a repositionable tape tab fastener
Inventor:
Ralf Korpman
Patented Case
View Patent ↗
Granted: Sep 10, 1985
Filed: Jul 21, 1982
Inventor
Ralf Korpman
Assignee (at issue)
Personal Products Company
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.