Granted Patent
Utility
US 4,917,294 · App. 07/406,043
Shut-off valve for scald prevention
Inventors:
Konrad Bergmann, Josef Ems, Hans Nikolayczik
Patented Case
View Patent ↗
Granted: Apr 17, 1990
Filed: Sep 12, 1989
Inventors
Konrad Bergmann
Josef Ems
Hans Nikolayczik
Assignee (at issue)
American Standard Inc.
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.