Granted Patent
Utility
US 5,812,504 · App. 08/747,570
Lift control device and method for controlling a lifter in optical disk player
Inventor:
Hyung Jun Yoo
Patented Case
View Patent ↗
Granted: Sep 22, 1998
Filed: Nov 12, 1996
Inventor
Hyung Jun Yoo
Assignee (at issue)
Goldstar 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.