Granted Patent
Utility
US 6,231,519 · App. 09/304,348
Method and apparatus for providing air quality analysis based on human reactions and clustering methods
Inventors:
Lioudmila Blants, Pekka Heinonen, Mikko Makipaa, Harri Wikberg
Patented Case
View Patent ↗
Granted: May 15, 2001
Filed: May 4, 1999
Inventors
Lioudmila Blants
Pekka Heinonen
Mikko Makipaa
Harri Wikberg
Assignee (at issue)
Nokia
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.