Granted Patent
Utility
US 6,375,372 · App. 09/781,260
Pushbutton structure of keyboard that generates pulse-like reaction when depressed
Inventor:
Yong Te Tsau
Patented Case
View Patent ↗
Granted: Apr 23, 2002
Filed: Feb 13, 2001
Inventor
Yong Te Tsau
Assignee (at issue)
BEHAVIOR TECH COMPUTER 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.