Granted Patent
Utility
US 6,668,539 · App. 09/933,525
Rotary heat engine
Inventor:
Andrew Schlote
Patented Case
View Patent ↗
Granted: Dec 30, 2003
Filed: Aug 20, 2001
Inventor
Andrew Schlote
Assignee (at issue)
INNOVATOR ENERGY LLC.
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.