Membership
Tour
Register
Log in
Cynthia B. Collins
Follow
Person
Hampton, NJ, US
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Blocked call notification system
Patent number
5,463,683
Issue date
Oct 31, 1995
AT&T Corp.
Cynthia B. Collins
H04 - ELECTRIC COMMUNICATION TECHNIQUE