Inventor

ZHANG HELEN

CN4 patents

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

ROVI GUIDES INC

2 patents

US9313537B2Apr 12, 2016

Methods and systems for presenting advertisements to particular users based on perceived lulls in media assets

ROVI GUIDES INC2 citations54

US9313538B2Apr 12, 2016

Methods and systems for establishing a mode of communication between particular users based on perceived lulls in media assets

ROVI GUIDES INC1 citations44

CIENA CORP

1 patent

US7414985B1Aug 19, 2008

Link aggregation

CIENA CORP37 citations90

ZHANG HELEN

1 patent

US9481865B2Nov 1, 2016

Serum-free freezing medium used in adipose-derived stem cells and establishment of adipose-derived stem cell library

ZHANG HELEN1 citations42