Granted Patent
Utility
US 6,176,166 · App. 09/376,924
Electric hair cutting machine with an automatic oil lubricating device
Inventors:
Detlef Mattinger, Martin Liebeck
Patented Case
View Patent ↗
Granted: Jan 23, 2001
Filed: Aug 18, 1999
Inventors
Detlef Mattinger
Martin Liebeck
Assignee (at issue)
Wella 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.