74264942
Apr 13, 1992
Apr 12, 1994
Active Trademark
electronic circuit components; namely, piezoceramic transducer crystals, [ abrasion-resistant coverings for electronic sensors, ] *and* piezoelectric elements, [ and technical ceramics; ] namely, [ silicon carbide, boron carbide, ] for medical and industrial non-destructive testing applications
Electrical and Scientific Apparatus