Samsung has taken to the stand in the Apple vs. Samsung patent case accusing Apple of breaching patents owned by the Korean company.The Korean Company accused Apple of infringing a series of patents covering email, photo albums and playing music on mobile devices.

Woodward Yang, a professor at Harvard University, was the fourth witness called by Samsung lawyers to establish their claims. He showed the jury videos that showed how music plays in the background of the iPhone, how photos can be placed into an email and how photographs can easily be scrolled through on the devices.

Samsung claims that Apple deliberately infringed its patents.

The Wall Street Journal reported that in Apple’s cross-examination of Mr. Yang, the iPhone maker said that Samsung did not claim to be producing devices that use two of the patents it asserted against Apple. Those patents cover photo albums and inserting photos into emails.

Apple also played the deposition of Jeong-Seok Oh, a Samsung designer who had been credited with inventing the technology behind one of the patents, who said he had prepared documents for the patent but they had subsequently been “discarded.”

The video deposition may play a role in the issue of instructions that will be given to the jury before they begin deliberations. They are expected to inform the jury that Samsung had failed to stop evidence from being destroyed, while leaving it to jurors to decide the importance of the company’s actions.

U.S. District Judge Lucy Koh who is presiding over the case is not impressed with either side. In one incident Intel stepped into the fray claiming that Tim Williams, Ph.D., one of Samsung’s expert witnesses should not testify because he had not properly disclosed that he had signed multiple nondisclosure agreements, one of which Intel says prohibits him from discussing the particulars of Intel’s source code.

Judge Koh said that she was not happy with the “theatrics” and questionable legal manoeuvring from both sides in the trial.