During the course of Thursday proceedings in the ongoing legal scuffle between Google and Oracle, Larry Page -- CEO of Google and its parent company Alphabet -- testified in federal court, defending Google's development of the Android mobile operating platform.

The legal battle between Google and Oracle dates back to 2010 when Oracle filed a lawsuit against Google, accusing Android developers of copying sections of proprietary code from Java. Oracle specifically claimed that Google had used 37 Java APIs, which had been acquired by Oracle as part of its takeover of Sun Microsystems.

Page testified in the federal court on Thursday that he did not have much knowledge of Android's engineering details which are at issue in the longstanding Google-Oracle lawsuit. However, he refuted Oracle's claims that the company's intellectual property had been stolen by Google as a result of the use of Java declaring code in Android.

Page said: "When Sun established Java, they established it as an open source thing. We didn't pay for the free and open things."

Further asserting that the in-question Java APIs had been implemented by Google in an original and transformative manner, Page suggested that Google's coding apparently falls under 'fair use;' and added: "I think we acted very responsibly and carefully around intellectual property issues."