Granted Patent
Utility
US 6,383,604 · App. 09/413,507
Keytop sheet using film and its manufacturing method
Inventors:
Sung Tae YOO, Chul Jin Kim
Patented Case
View Patent ↗
Granted: May 7, 2002
Filed: Oct 6, 1999
Inventors
Sung Tae YOO
Chul Jin Kim
Assignee (at issue)
LG Information & Communications, 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.