The jury will begin deliberating today in the trial between Apple and Samsung over a patents dispute that could have a major impact on the industry.

Apple's worldwide legal crusade against the Android mobile operating system drew toward a climax yesterday as the iPhone maker's attorneys accused Samsung of taking a shortcut by copying Apple's designs after realising it could not keep up.

Samsung attorney Charles Verhoeven countered by urging jurors to consider that a verdict in favour of Apple could stifle competition and reduce choices for consumers.

"Rather than competing in the marketplace, Apple is seeking a competitive edge in the courtroom," Mr Verhoeven said. "(Apple thinks) it's entitled to having a monopoly on a rounded rectangle with a large screen. It's amazing really."

Apple and Samsung are going toe-to-toe in a patents dispute that mirrors the struggle for industry supremacy between the two companies, which control more than half of worldwide smartphone sales.

A win for Apple could have a major impact on the industry because the South Korean company's mobile products are run on Google's Android operating system, popular software that is used by many other manufacturers. Before he died, Apple co-founder Steve Jobs told his biographer he intended to go "thermonuclear" on Android, saying it had copied Apple.

If the jury determines Samsung violated Apple's valid patents, US District Judge Lucy Koh could impose sales bans against the Korean company's products.

In court yesterday, Apple attorney Harold McElhinny urged jurors to consider the testimony of a South Korean designer who said she worked day and night on Samsung's phones for three months.

"In those critical three months, Samsung was able to copy and incorporate the result of Apple's four-year investment in hard work and ingenuity - without taking any of the risks," Mr McElhinny said.

Apple is seeking more than $2.5 billion in damages from Samsung. An Apple expert said Samsung earned 35.5 per cent margins on the tablets and phones at issue in the lawsuit from mid-2010 through March 2012, on $8.16 billion in U.S. revenue. Samsung has disputed that figure.

Apple accuses Samsung of copying the design and some features of its iPad and iPhone, and is asking for a sales ban in addition to monetary damages. Samsung, which is trying to expand in the United States, says Apple infringed several patents, including some for its key wireless technology.

Both Apple and Samsung used a series of internal emails, witness testimony from designers, product demonstrations and mockups to present their case.

Mr McElhinny laid out what he said was chronological evidence that showed Samsung copied Apple's designs. He also told the jury that, while Apple brought many of its top executives to testify and face cross examination, Samsung had presented no major decision makers.

"From the very beginning, Samsung has disrespected this process," he said.

Mr McElhinny said Samsung's internal documents compared its products with Apple's - and determined it had a crisis of design.

The nine member jury spent over two hours listening to granular legal instructions before Apple's McElhinny began his presentation just after lunch.

Mr McElhinny focused on a meeting between Samsung and Google executives in February 2010, where Google asked Samsung to stop imitating the iPad so closely.

"Samsung executives chose to ignore that demand and continue on the path of copying," he said.

Apple said the products looked so similar that it led to confusion in the marketplace.

Samsung's Verhoeven said Apple had not shown any evidence that consumers were actually deceived into buying Samsung products instead of the iPhone or iPad.

"Consumers make choices, not mistakes," he said. Mr Verhoeven also went on to tell the jury that Apple's damages claims were not calculated correctly, calling them "ridiculous".

On rebuttal, Apple attorney Bill Lee said Apple was not trying to keep Samsung out of the smartphone market. "All we're saying is, 'Make your own,'" Mr Lee said.

The trial, which is in its fourth week, has revealed details about the famously secretive maker of the iPhone and iPad, some substantive and some just colourful.

Among the evidence were emails sent by Apple's internet services chief to top Apple executives, urging them to consider a smaller iPad and indicating that Mr Jobs was warming to the idea.

An Apple industrial designer described working around a kitchen table with his team to come up with the company's mobile products.

Its patent licensing director also said Microsoft was one of the few companies to get a license for Apple design patents, but only because Microsoft consented to an anti-cloning provision.

Reuters