Inventor
EISDORFER ALLEN
US5 patents
Patents
5 patentsUS5894504AApr 13, 1999
Advanced call waiting and messaging system
AT & T CORP381 citations95
US5724411AMar 3, 1998
Method for selectively alerting multiple telephones of an incoming call
AT & T CORP182 citations94
US5706339AJan 6, 1998
Technique for use in processing personal telephone calls
AT & T CORP57 citations94
US5893903AApr 13, 1999
Multimedia message system with revenue allocation
AT & T CORP26 citations90
US5960348ASep 28, 1999
Technique for use in processing telephone calls
AT & T CORP13 citations73