Ringback Patents
Patents for personalized ringback tone delivery systems were first filed in Korea by Kang-seok Kim (10-1999-0005344) in October 1999 and in the United States by Mark Gregorek et al. (U.S. patent 5,321,740), Neil Sleevi (U.S. patent 4,811,382), and Karl Seelig (U.S. patents 7,006,608 and 7,227,929). Onmobile Global Ltd. India, Method and system for customizing ring-back tone in an inter-operator telecommunication system Nov, 18 2010: US 20100290602. Onmobile Global Ltd. India, Method and system for updating social networking site with ring back tone information Oct, 7 2010: US 201002558
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