American aircraft giant Boeing Co on Tuesday announced that had resumed delivery of its high-tech 787 Dreamliner planes.

Boeing had stopped deliveries of the 787 Dreamliner around four months back following two incidents involving the overheating of lithium ion batteries in two planes owned by All Nippon Airways and Japan Airlines.

Regulators had ordered a worldwide grounding of the Dreamliners, citing safety concerns.

The grounding of the planes worldwide forced Boeing to modify the planes with new batteries, which received the US Federal Aviation Administration's approval on 19th of April.

Boeing made the first delivery of the modified Dreamliner to Japan's All Nippon Airways, which will resume commercial flights of the planes on 1st of June.

The American aircraft maker has so far not given an estimate of cost that it incurred due to the grounding and repairs of the Dreamliners. The company said it absorbed almost all of the impact within the first quarter while also claiming that it was still enjoying an increase in profit. Analysts, however, have estimated that the grounding and repairs of the Dreamliners would cost the company nearly $600 million.

Boeing shares gained 1.4 per cent to close at their highest level since November 2007, at $96.11 apiece, on the New York Stock Exchange (NYSE) on Tuesday.