Granted Patent
Utility
US 4,842,007 · App. 07/241,464
Self-sealing valve for inflated bodies
Inventor:
Richard Kurtz
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: Sep 8, 1988
Inventor
Richard Kurtz
Assignee (at issue)
Guard, 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.