Granted Patent
Utility
US 6,538,892 · App. 09/847,722
Radial finned heat sink
Inventor:
Martin David Smalc
Patented Case
View Patent ↗
Granted: Mar 25, 2003
Filed: May 2, 2001
Inventor
Martin David Smalc
Assignee (at issue)
GraftTech Inc.
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.