Inventor
DERRYBERRY BARBARA
US8 patents
⚠️ This page may combine multiple inventors who share the name “DERRYBERRY BARBARA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NORTEL NETWORKS LTD
3 patentsUS7801953B1Sep 21, 2010
Push-to-talk wireless telecommunications system utilizing an voice-over-IP network
NORTEL NETWORKS LTD112 citations98
US7170863B1Jan 30, 2007
Push-to-talk wireless telecommunications system utilizing a voice-over-IP network
NORTEL NETWORKS LTD385 citations98
US7826603B1Nov 2, 2010
Push-to-talk wireless telecommunications system utilizing a voice-over-IP network
NORTEL NETWORKS LTD71 citations97
APPLE INC
3 patentsUS8694041B2Apr 8, 2014
Push-to-talk telecommunications system utilizing an voice-over-IP network
APPLE INC10 citations92
US9014742B2Apr 21, 2015
Push-to-talk telecommunications system utilizing an voice-over-IP network
APPLE INC2 citations62
US9723458B2Aug 1, 2017
Push-to-talk telecommunications system utilizing an voice-over-IP network
APPLE INC0 citations51