Granted Patent
Utility
US 4,891,009 · App. 07/118,955
Apparatus for holding workpieces
Inventors:
Werner Pivit, Ralf Nachtsheim
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: Nov 12, 1987
Inventors
Werner Pivit
Ralf Nachtsheim
Assignee (at issue)
Leybold 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.