Granted Patent
Utility
US 4,247,231 · App. 06/001,705
Tool holder
Inventor:
Rolf Kraemer
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Jan 8, 1979
Inventor
Rolf Kraemer
Assignee (at issue)
Fansteel 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.