Inventor

FRANCIS JOHN D

US4 patents

⚠️ This page may combine multiple inventors who share the name “FRANCIS JOHN D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

AT & T IP II LP

2 patents

US7831025B1Nov 9, 2010

Method and system for administering subjective listening test to remote users

AT & T IP II LP11 citations77

US9420080B2Aug 16, 2016

Method and apparatus for providing privacy for telephone conversations

AT & T IP II LP0 citations44

CHEN BING

1 patent

US9178478B2Nov 3, 2015

Method and apparatus for providing privacy for telephone conversations

CHEN BING0 citations45

AT & T CORP

1 patent

US6480576B1Nov 12, 2002

Method and device for detecting path faults in a network

AT & T CORP1 citations40