Granted Patent
Utility
US 4,440,459 · App. 06/376,183
Rotatable shelf hardware
Inventor:
Charles G. Hallgren
Patented Case
View Patent ↗
Granted: Apr 3, 1984
Filed: May 7, 1982
Inventor
Charles G. Hallgren
Assignee (at issue)
Keystone Consolidated Industries, 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.