Granted Patent
Utility
US 6,446,839 · App. 09/641,049
Dispenser with manually operable discharge device
Inventor:
Stefan Ritsche
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Aug 17, 2000
Inventor
Stefan Ritsche
Assignee (at issue)
Ing. Erich Pfeiffer 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.