Inventor
LEE MING J
US5 patents
Patents
5 patentsUS5933784AAug 3, 1999
Signaling gateway system and method
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US6128389AOct 3, 2000
Authentication key management system and method
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US5850445ADec 15, 1998
Authentication key management system and method
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US5799084AAug 25, 1998
System and method for authenticating cellular telephonic communication
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US5970144AOct 19, 1999
Secure authentication-key management system and method for mobile communications
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