Granted Patent
Utility
US 6,523,645 · App. 09/646,976
Pumping device for lubrication of saw chain
Inventors:
Jörgen Johansson, Pär Martinsson
Patented Case
View Patent ↗
Granted: Feb 25, 2003
Filed: Dec 8, 2000
Inventors
Jörgen Johansson
Pär Martinsson
Assignee (at issue)
Aktiebolaget Electrolux
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.