Granted Patent
Utility
US 6,112,338 · App. 09/353,622
Mixing drum and composting toilet
Inventor:
Henric Sundberg
Patented Case
View Patent ↗
Granted: Sep 5, 2000
Filed: Jul 15, 1999
Inventor
Henric Sundberg
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.