Inventor

BLACKBURN ALAN R

US4 patents

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

AT & T IP I LP

2 patents

US7933390B2Apr 26, 2011

Region-wide messaging system and methods including validation of transactions

AT & T IP I LP13 citations81

US7646856B2Jan 12, 2010

Region-wide messaging system and methods including validation of transactions

AT & T IP I LP13 citations81

BELLSOUTH INTELLECT PTY CORP

1 patent

US6661785B1Dec 9, 2003

Method and apparatus for providing internet call waiting with voice over internet protocol

BELLSOUTH INTELLECT PTY CORP331 citations97

PHASE SYSTEMS LLC

1 patent

US7342919B2Mar 11, 2008

Method and apparatus for providing internet call waiting with voice over internet protocol

PHASE SYSTEMS LLC24 citations89