Granted Patent
Utility
US 6,689,977 · App. 09/918,926
Keyswitch having a keytop that is upwardly and downwardly movable and method of assembling the same
Inventors:
Takayuki Ito, Tsuyoshi Narusawa
Patented Case
View Patent ↗
Granted: Feb 10, 2004
Filed: Jul 31, 2001
Inventors
Takayuki Ito
Tsuyoshi Narusawa
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.