Granted Patent
Utility
US 6,561,923 · App. 09/347,398
Colored golf ball
Inventors:
Keiji Ohama, Hidenori Hiraoka
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: Jul 6, 1999
Inventors
Keiji Ohama
Hidenori Hiraoka
Assignee (at issue)
SUMITOMO RUBBER INDUSTRIES, 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.