They do, apparently:
Domain ID:D90708-MOBI
Domain Name:TELLME.MOBI
Created On:08-Sep-2006 01:10:40 UTC
Last Updated On:05-Jan-2007 15:39:46 UTC
Expiration Date:08-Sep-2008 01:10:40 UTC
Trademark Name:TELLME
Trademark Country:US
Trademark Number:75752278
Date Trademark Applied For:1999-07-15
Date Trademark Registered:2001-03-27
Sponsoring Registrar:Go Daddy Software, Inc (146)
Created by Registrar:Go Daddy Software, Inc (146)
Last Updated by Registrar:Go Daddy Software, Inc (146)
Status:OK
Registrant ID:GODA-023244848
Registrant Name:Tellme Hostmaster
Registrant Organization:Tellme Networks, Inc.
Registrant Street1:1310 Villa St
Registrant City:Mountain View
Registrant State/Province:California