Samsung attorney Bill Price spent almost two hours chipping away at Hauser's testimony.
He questioned the specific wording of some parts of the study, such as pointing out that automatic word correction had been described as requiring that a period or space be entered before the word was corrected. The Galaxy S III, one of the accused phones, corrects words before an additional key press.
Price also questioned the general value of the study, as it looked solely at features and discounted the Samsung brand or user's allegiance to Android.
"One of the major questions is whether Apple has lost anything to Samsung," Price said. "Buying a different version of a phone is very different from buying a different phone."
"Yes, it is," Hauser said.
Samsung is expected to argue later in the case that it doesn't owe Apple any more than $6 million in lost sales and royalties.
This is the second patent infringement case between the two phone makers. In an earlier case, which has been appealed, two juries have ordered Samsung to pay Apple a total of $929 million for infringement of different patents in different phones.
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