Granted Patent
Utility
US 6,340,288 · App. 09/341,107
High-pressure fan
Inventors:
Rauli T Hulkkonen, Jyri-Markku Vuorenmaa, Joni Tallgren
Patented Case
View Patent ↗
Granted: Jan 22, 2002
Filed: Jul 2, 1999
Inventors
Rauli T Hulkkonen
Jyri-Markku Vuorenmaa
Joni Tallgren
Assignee (at issue)
ABB Flakt Oy
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.