HC

Hisao Chang

AT AT&T: 3 patents #205 of 1,788Top 15%
🗺 Texas: #955 of 11,512 inventorsTop 9%
Overall (2011): #48,012 of 364,097Top 15%
3
Patents 2011

Issued Patents 2011

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
7912201 Directory assistance dialog with configuration switches to switch from automated speech recognition to operator-assisted dialog John M. Martin, Robert R. Bushey 2011-03-22
7881451 Automated directory assistance system for a hybrid TDM/VoIP network 2011-02-01
7873029 System and method of providing multimedia communication services Javier Arellano, Steven Frew, Sreenivasa Gorti, Bach N. Hoang 2011-01-18