Granted Patent
Utility
US 5,152,646 · App. 07/732,537
Method for the production of an internal slide surface on a guide sleeve consisting of plastic material for a length-adjustable chair column
Inventor:
Hans J. Bauer
Patented Case
View Patent ↗
Granted: Oct 6, 1992
Filed: Jul 19, 1991
Inventor
Hans J. Bauer
Assignee (at issue)
SUSPA 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.