Granted Patent
Utility
US 4,438,898 · App. 06/145,622
Chain control locking assembly
Inventors:
Jack R. Knoblauch, Duane M. Beukema, Kenneth W. Hozeski
Patented Case
View Patent ↗
Granted: Mar 27, 1984
Filed: May 1, 1980
Inventors
Jack R. Knoblauch
Duane M. Beukema
Kenneth W. Hozeski
Assignee (at issue)
Steelcase 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.