Granted Patent
Utility
US 5,689,575 · App. 08/346,164
Method and apparatus for processing images of facial expressions
Inventors:
Hiroshi Sako, Anthony Vernon Walker Smith, Mark P. Whitehouse
Patented Case
View Patent ↗
Granted: Nov 18, 1997
Filed: Nov 21, 1994
Inventors
Hiroshi Sako
Anthony Vernon Walker Smith
Mark P. Whitehouse
Assignee (at issue)
HITACHI, 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.