Granted Patent
Utility
US 5,283,408 · App. 07/924,710
Structure of key switch
Inventor:
S.L. CHEN
Patented Case
View Patent ↗
Granted: Feb 1, 1994
Filed: Aug 4, 1992
Inventor
S.L. CHEN
Assignee (at issue)
Silitek Corporation
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.