Membership
Tour
Register
Log in
Steven E. Betts
Follow
Person
Roswell, GA, US
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Method and apparatus for preventing return dial tone fraud in a cel...
Patent number
5,818,916
Issue date
Oct 6, 1998
Technology Service Group
Allen W. Vogl
H04 - ELECTRIC COMMUNICATION TECHNIQUE