74439561
Sep 24, 1993
Apr 1, 1997
ELECTRONIC APPARATUS FOR MONITORING, SENSING AND MEASURING LIQUID LEVELS, EXCEPT IN THE DESIGN, MANUFACTURE, REPAIR, MAINTENANCE, OPERATION, SERVICE, MONITORING, INSTALLATION OR MODERNIZATION OF ELEVATORS, ESCALATORS, MOVING WALKWAYS AND RELATED PEOPLE-MOVING CARRIERS
Electrical and Scientific Apparatus