Granted Patent
Utility
US 6,212,548 · App. 09/126,162
System and method for multiple asynchronous text chat conversations
Inventors:
Antonio DeSimone, Elizabeth A. Hohne, Rangamani Sundar, Vishwanathan Thiagarajan, Kumar K. Vishwanathan
Patented Case
View Patent ↗
Granted: Apr 3, 2001
Filed: Jul 30, 1998
Inventors
Antonio DeSimone
Elizabeth A. Hohne
Rangamani Sundar
Vishwanathan Thiagarajan
Kumar K. Vishwanathan
Assignee (at issue)
AT&T CORP.
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.