Granted Patent
Utility
US 4,257,624 · App. 05/972,464
Extendible steering column
Inventor:
Kenneth N. Hansen
Patented Case
View Patent ↗
Granted: Mar 24, 1981
Filed: Dec 22, 1978
Inventor
Kenneth N. Hansen
Assignee (at issue)
Allis-Chalmers 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.