0001181476-04-000002 4 1 20040401 20040405 CADENCE DESIGN SYSTEMS INC 0000813672 7372 770148231 DE 0102 2655 SEELY ROAD BLDG 5 SAN JOSE CA 95134 4089431234 555 RIVER OAKS PARKWAY SAN JOSE CA 95134 ECAD INC /DE/ 19880609 MALONEY SEAN 0001181476 4 34 001-10606 04716621 2655 SEALY AVE. SAN JOSE CA 95134 4089431234 4 1 edgar.xml PRIMARY DOCUMENT