Granted Patent
Utility
US 6,472,846 · App. 09/831,529
Power source
Inventors:
John Edward Hutchinson, Pierre Becker
Patented Case
View Patent ↗
Granted: Oct 29, 2002
Filed: Jul 13, 2001
Inventors
John Edward Hutchinson
Pierre Becker
Assignee (at issue)
Freeplay Market Development Limited
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.