Granted Patent
Utility
US 5,595,521 · App. 08/475,422
Balloons and balloon valves
Inventor:
Charles Becker
Patented Case
View Patent ↗
Granted: Jan 21, 1997
Filed: Jun 7, 1995
Inventor
Charles Becker
Assignee (at issue)
M & D Balloons, 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.