Granted Patent
Utility
US 6,539,561 · App. 09/960,804
Bath tab with built-in illumination device
Inventor:
Hideo Shimizu
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: Sep 21, 2001
Inventor
Hideo Shimizu
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.