Granted Patent
Utility
US 4,231,624 · App. 05/959,176
Locking rotary file
Inventor:
Hildaur L. Neilsen
Patented Case
View Patent ↗
Granted: Nov 4, 1980
Filed: Nov 9, 1978
Inventor
Hildaur L. Neilsen
Assignee (at issue)
Rolodex 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.