Granted Patent
Utility
US 6,668,771 · App. 10/193,449
Two-stroke internal combustion engine
Inventor:
Pär Martinsson
Patented Case
View Patent ↗
Granted: Dec 30, 2003
Filed: Jul 11, 2002
Inventor
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.