Derryberry; Barbara

Patent Applications and Registrations

Patent applications and USPTO patent grants for Derryberry; Barbara.The latest application filed is for "push-to-talk telecommunications system utilizing an voice-over-ip network".

Company Profile

0.9.5

Derryberry; Barbara - Plano TX

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Push-to-Talk Telecommunications System Utilizing an Voice-Over-IP Network App 20150223031 - Denman; Robert E. ; et al.	2015-08-06
Push-to-talk telecommunications system utilizing an voice-over-IP network Grant 9,014,742 - Denman , et al. April 21, 2	2015-04-21
Push-to-Talk Telecommunications System Utilizing an Voice-Over-IP Network App 20140221035 - Denman; Robert E. ; et al.	2014-08-07
Push-to-talk telecommunications system utilizing an voice-over-IP network Grant 8,694,041 - Denman , et al. April 8, 2	2014-04-08
Push-to-talk Telecommunications System Utilizing An Voice-over-ip Network App 20130281147 - Denman; Robert E. ; et al.	2013-10-24
Push-to-talk telecommunications system utilizing a voice-over-IP network Grant 8,447,341 - Denman , et al. May 21, 2	2013-05-21
Push-to-talk wireless telecommunications system utilizing a voice-over-IP network Grant 8,428,237 - Denman , et al. April 23, 2	2013-04-23
Push-to-talk wireless telecommunications system utilizing a voice-over-IP network Grant 7,826,603 - Denman , et al. November 2, 2	2010-11-02
Push-to-talk Telecommunications System Utilizing A Voice-over-ip Network App 20100248772 - Denman; Robert ; et al.	2010-09-30
Push-to-talk wireless telecommunications system utilizing an voice-over-IP network Grant 7,801,953 - Denman , et al. September 21, 2	2010-09-21
Push-to-talk wireless telecommunications system utilizing a voice-over-IP network Grant 7,170,863 - Denman , et al. January 30, 2	2007-01-30

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