Granted Patent
Utility
US 6,721,402 · App. 10/118,239
Apparatus, method, and record medium for automatically categorizing received mail messages
Inventor:
Shinya Usami
Patented Case
View Patent ↗
Granted: Apr 13, 2004
Filed: Apr 9, 2002
Inventor
Shinya Usami
Assignee (at issue)
NEC CORPORATION
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.