Boston: Steve Jobs-led Apple has sued Samsung Electronics in US District Court of northern California, alleging it copied company’s bestsellers iPad tablet and iPhone.

Technology giant Apple claimed in its lawsuit against the Korean consumer durable major's Galaxy line of tablets and smartphones are a copy of iPad tablet and iPhone.

In the 38-page lawsuit, Apple said Samsung "slavishly" copied the look, product design, packaging and user interface of its products in violation of its patents and trademarks.

"Rather than innovating and developing its own technology, Samsung chose to copy Apple's technology, user interface and innovative style in these infringing products," Apple said.

In the lawsuit, Apple compared its iPhone 3GS, launched in June, 2009 with Galaxy's S i9000 model, released in March, 2010.

Comparing photos and images, Apple pointed out similarities in the two companies' packaging and icons for applications such as texting, music, phone and contacts.

"This kind of blatant copying is wrong," a newspaper quoted Apple spokeswoman Kristin Huguet saying.

Samsung spokesperson said, "Samsung's development of core technologies and strengthening our intellectual property portfolio are keys to our continued success."

Research firm IDC estimated that the smartphone market will grow more than 49 percent in 2011 from 303.4 million units last year.

Apple is expected to dominate the tablet market through 2015. Apple had launched the iPad last year and the iPad 2 in March this year.

The company has sold over 108 million iPhones and 19 million iPads, as well as more than 60 million digital music player iPod Touch.

However with companies like Motorola, RIM and Dell launching tablets, Apple is facing stiff competition and challenges to remain the tablet and smartphone market leader.

Meanwhile, Samsung's Galaxy S smartphone is fast becoming a popular device globally, shipping 10 million units as of January.