Granted Patent
Utility
US 6,450,248 · App. 10/020,029
Heat sink retainer
Inventor:
Ching-Sheng Chang
Patented Case
View Patent ↗
Granted: Sep 17, 2002
Filed: Oct 29, 2001
Inventor
Ching-Sheng Chang
Assignee (at issue)
Hoya Tech 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.