Granted Patent
Utility
US 4,917,646 · App. 07/233,156
Self-sealing valve, a self-sealing, non-latex balloon, and a method for producing such a balloon
Inventor:
Garry Kieves
Patented Case
View Patent ↗
Granted: Apr 17, 1990
Filed: Aug 17, 1988
Inventor
Garry Kieves
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.