Granted Patent
Utility
US 6,045,187 · App. 09/075,114
Chair seat height adjustment mechanism
Inventor:
William S. Stumpf
Patented Case
View Patent ↗
Granted: Apr 4, 2000
Filed: May 8, 1998
Inventor
William S. Stumpf
Assignee (at issue)
Northfield Metal Products Limited
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.