Granted Patent
Utility
US 6,256,012 · App. 09/139,796
Uninterrupted curved disc pointing device
Inventor:
Dean DeVolpi
Patented Case
View Patent ↗
Granted: Jul 3, 2001
Filed: Aug 25, 1998
Inventor
Dean DeVolpi
Assignee (at issue)
Varatouch Technology Incorporated
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.