US patent #5,311,516 Paging systems using message fragmentation to redistribute traffic
US patent #5,319,712 Method and apparatus for providing cryptographic protection of a data stream
US patent #5,490,230 Digital speech coder having optimized signal energy parameters
US patent #5,572,193 Method for authentication and protection of subscribers in telecommunications systems
US patent #6,175,559 Method for generating preamble sequences in a code division multiple access systems
US patent #6,359,898 Method for performing a countdown function during a mobile-originated transfer for a packet radio system
US patent #5,359,317 Method and apparatus for selectively storing a portion of a received message in a selective call receiver
US patent #5,636,223 Methods of adaptive channel access attempts
US patent #6,246,697 Method and system for generating a complex pseudonoise sequence for processing a code division multiple access signal
US patent #6,246,862 Sensor controlled user interface for portable communication device
US patent #6,272,333 Method and apparatus in a wireless communication system for controlling a delivery of data
US patent #7,751,826 System and method for E911 location privacy protection
US patent #5,710,987 Receiver having concealed external antenna
US patent #5,754,119 Multiple pager status synchronization system and method
US patent #5,958,006 Method and apparatus for communicating summarized data
US patent #6,008,737 Apparatus for controlling utilization of software added to a portable communication device
US patent #6,101,531 System for communicating user-selected criteria filter prepared at wireless client to communication server for filtering data transferred from host to said wireless client
US patent #6,377,161 Method and apparatus in a wireless messaging system for facilitating an exchange of address information
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