Granted Patent
Utility
US 6,279,521 · App. 09/459,021
Two-cycle engine
Inventors:
Shigetoshi Ishida, Naoki Tsuruoka, Yasuhiro Sensui
Patented Case
View Patent ↗
Granted: Aug 28, 2001
Filed: Dec 10, 1999
Inventors
Shigetoshi Ishida
Naoki Tsuruoka
Yasuhiro Sensui
Assignee (at issue)
Tanaka Kogyo Co., 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.