0000891618-04-001019 424B3 1 20040519 CADENCE DESIGN SYSTEMS INC 0000813672 7372 770148231 DE 0102 424B3 33 333-110346 04819439 2655 SEELY ROAD BLDG 5 SAN JOSE CA 95134 4089431234 555 RIVER OAKS PARKWAY SAN JOSE CA 95134 ECAD INC /DE/ 19880609 424B3 1 f99163e424b3.htm PROSPECTUS SUPPLEMENT