Granted Patent
Utility
US 6,259,049 · App. 09/588,445
Key switch device with low-profile key top which gives three-dimensional appearance and looks thicker than actual one
Inventor:
Takashi Nakai
Patented Case
View Patent ↗
Granted: Jul 10, 2001
Filed: Jun 6, 2000
Inventor
Takashi Nakai
Assignee (at issue)
ALPS ELECTRIC 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.