Inventor

YU I-HSIANG

US10 patents

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

VERIZON LAB INC

4 patents

US6535746B1Mar 18, 2003

Method and apparatus supporting short message services in a wireless number portability environment

VERIZON LAB INC151 citations97

US6240296B1May 29, 2001

Method and apparatus for supporting short message services in a wireless number portability environment

VERIZON LAB INC32 citations91

US6192241B1Feb 20, 2001

Worldwide wireless subscriber access service

VERIZON LAB INC51 citations87

US6445785B1Sep 3, 2002

Methods and apparatus for local number portability in telecommunication systems

VERIZON LAB INC46 citations86

AT & T BELL LAB

2 patents

US5204902AApr 20, 1993

Cellular telephony authentication arrangement

AT & T BELL LAB189 citations97

US5018187AMay 21, 1991

Mobile telephone intrasystem and intersystem enhanced handoff method and apparatus for limiting trunk switching connections

AT & T BELL LAB37 citations86

GTE LABORATORIES INC

2 patents

US5787347AJul 28, 1998

Method and apparatus for selecting a cellular system for communication with a cellular telephone in a roaming area

GTE LABORATORIES INC88 citations94

US5764745AJun 9, 1998

Apparatus and method for local number portability using nongeographic subscriber numbers

GTE LABORATORIES INC125 citations93

IRIDIUM LLC

1 patent

US6338140B1Jan 8, 2002

Method and system for validating subscriber identities in a communications network

IRIDIUM LLC206 citations91

NEUSTAR INC

1 patent

US7720082B2May 18, 2010

System and method for short message service and instant messaging continuity

NEUSTAR INC5 citations60