Roger R. Roth

Method of semiautomatic ambient light sensor calibration in an automatic control system

Passive signal coupler between power distribution systems for the transmission of data signals over the power lines

Integrated power level control and on/off function circuit

On-site calibration device and method for nonlinearity correction for flow sensor/transmitter

Token passing communication network including a node which maintains and transmits a list specifying the order in which the token is passed

VAV airflow control for preventing processor overflow and underflow

Automatic self configuration of client-supervisory nodes

Message generating communication apparatus having a message preamble format allowing parts of certain messages to be ignored

Fail-safe load power management system

Voltage follower circuit for use in power level control circuits.