P
PatentIndex
Search
Landscape
Sign in
Inventor
COVALLA THOMAS A
US
2 patents
Patents
2 patents
US7715823B2
May 11, 2010
Methods and apparatus for restricting access of a user using a cellular telephone
IBM
53 citations
93
US7133662B2
Nov 7, 2006
Methods and apparatus for restricting access of a user using a cellular telephone
IBM
25 citations
88