Granted Patent
Utility
US 6,619,214 · App. 09/887,995
Method and apparatus for treatment of waste
Inventor:
William Charles Walker
Patented Case
View Patent ↗
Granted: Sep 16, 2003
Filed: Jun 20, 2001
Inventor
William Charles Walker
Assignee (at issue)
Karen Meyer Bertram
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.