Alk Technologies, Inc.

David Bernstein

Alain L Kornhauser

A client/server navigation system utilizes partial route guidance trees, enabling a thin, mobile client to detect route deviation and provide alternate instructions while awaiting response from a server. The system () consists of a server () containing a network database and route-calculation program; a client () capable of obtaining () its current location and destination, displaying route instructions (), and determining when it needs additional instructions from the server (); and communication () between the client () and server (). The invention allows for long routes and responsive operation on a small, low-powered client despite lags and lapses in communication.

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Mt. Crawford, VA, United States of America

David Bernstein