Granted Patent
Utility
US 4,906,057 · App. 06/550,959
Closed portable card file
Inventors:
Richard A. Davi, Hildaur L. Neilsen
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: Nov 10, 1983
Inventors
Richard A. Davi
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.