Granted Patent
Utility
US 5,515,555 · App. 08/351,376
Device for controlling the operation of a vacuum toilet
Inventor:
Hans Wormcke
Patented Case
View Patent ↗
Granted: May 14, 1996
Filed: Dec 9, 1994
Inventor
Hans Wormcke
Assignee (at issue)
Sanivac Vakuumtechnik GmbH
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.