Riparius Ventures LLC holds US Patents 6,859,525, 7,016,481, and
7,139,371 on corded and cordless Internet Telephone Handsets. 

Additional continuations are in process.

We are actively licensing these technologies to US and foreign manufacturers and OEMs for the production and sale of Internet telephony devices.  Please contact us for terms and associated costs. 

You may review the text of the patents at www.uspto.gov.