Granted Patent
Utility
US 6,812,420 · App. 10/153,707
Key switch operating mechanism assembly for electronic portable device
Inventors:
Mitsumasa Kako, Isao Mochizuki
Patented Case
View Patent ↗
Granted: Nov 2, 2004
Filed: May 24, 2002
Inventors
Mitsumasa Kako
Isao Mochizuki
Assignee (at issue)
Brother Kogyo Kabushiki Kaisha
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.