Inventor

CHANG FREDERICK ROBERT

US5 patents

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

SBC TECHN RES INC

1 patent

US7272645B2Sep 18, 2007

Method of improving the reliability of peer-to-peer network downloads

SBC TECHN RES INC57 citations93

AT & T KNOWLEDGE VENTURES LP

1 patent

US7475132B2Jan 6, 2009

Method of improving the reliability of peer-to-peer network downloads

AT & T KNOWLEDGE VENTURES LP9 citations81

AT & T IP I LP

1 patent

US7633951B2Dec 15, 2009

Ethernet wide area network and method

AT & T IP I LP2 citations60

SBC KNOWLEDGE VENTURES LP

1 patent

US7046671B2May 16, 2006

Ethernet wide area network and method

SBC KNOWLEDGE VENTURES LP4 citations60

CHANG FREDERICK ROBERT

1 patent

US8149853B2Apr 3, 2012

Ethernet wide area networks and methods

CHANG FREDERICK ROBERT0 citations43