During the course of Friday's proceedings in the second Apple vs. Samsung patent trial in California, Samsung's first witness Hiroshi Lockheimer - Vice President of Android Engineering at Google - testified about the development of Google's Android operating system.

Samsung brought up Lockheimer as a witness in the trial in order to refute Apple's allegations that the Samsung smartphones and tablets copied Apple's iPhone and iPad. Apple has accused Samsung of infringing five of its patents, and is seeking nearly $2.2 billion in damages.

Samsung's main argument in rebuffing Apple's patent-infringement accusations is that certain features of mobile devices were invented by Google before Apple patented them.

Towards that end, Lockheimer comprehensively detailed the differences between Android and iOS, particularly focusing on the early days of the Android project. He asserted that a concerted effort was made by the team of engineers working on the project to make Android a distinct operating system.

Lockheimer said: "We liked to have our own identity, we liked to have our own ideas."

Lockheimer's testimony was designed to prove that some mobile-device features which Apple has accused Samsung of copying were already a part of the Android operating system which runs Samsung's devices like the Galaxy Nexus. Moreover, some specific features - other than the "slide-to-unlock" feature - were developed by Google before being patented by Apple.