SEOUL, South Korea (AP) — Samsung and Blackberry have splashed frigid water on a report that Samsung wants to make a $7.5 billion takeover offer for the struggling Canadian device maker. [...] analysts say it has technology and intellectual property that could make it attractive to Samsung, which is looking to revive growth momentum as it smartphone business falters. Despite its plunging share of the overall smartphone market, BlackBerry still has a strong presence in the business market that Samsung is trying to crack.