73726034
May 2, 1988
Jan 10, 1989
PIEZO-ELECTRIC SPARK IGNITION UNITS, ELECTRONICALLY GENERATED SPARK IGNITION UNITS, HOT SURFACE IGNITION UNITS ALL FOR USE WITH NATURAL AND BOTTLED GAS APPLICATIONS, CERAMIC RESONATORS, CERAMIC BANDPASS FILTERS; PIEZO-ELECTRIC TRANSDUCERS AND PIEZO-METERS
Electrical and Scientific Apparatus