Granted Patent
Utility
US 4,788,715 · App. 06/920,260
Announcing waiting times in queuing systems
Inventor:
Dooyong Lee
Patented Case
View Patent ↗
Granted: Nov 29, 1988
Filed: Oct 16, 1986
Inventor
Dooyong Lee
Assignee (at issue)
American Telephone and Telegraph Company, AT&T Bell Laboratories
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.