Granted Patent
Utility
US 4,667,587 · App. 06/729,325
Electric coffee maker with anti-drip valve on bottom of filter
Inventor:
Dieter Wunder
Patented Case
View Patent ↗
Granted: May 26, 1987
Filed: May 1, 1985
Inventor
Dieter Wunder
Assignee (at issue)
The Braun Corporation
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.