Granted Patent
Utility
US 6,056,458 · App. 09/291,011
Computer keyboard with Z-axis input means
Inventor:
Chien-Pang Lin
Patented Case
View Patent ↗
Granted: May 2, 2000
Filed: Apr 14, 1999
Inventor
Chien-Pang Lin
Assignee (at issue)
DEXIN CORP.
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.