Granted Patent
Utility
US 6,739,939 · App. 10/136,724
Toy top game unit
Inventor:
Hiroyuki Matsukawa
Patented Case
View Patent ↗
Granted: May 25, 2004
Filed: Apr 30, 2002
Inventor
Hiroyuki Matsukawa
Assignee (at issue)
Takara Co., Ltd.
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.