The European Commission (EC) has started two anti-trust investigations against Motorola over whether the firm abused its patent holdings by seeking injunctions against products from Apple and Microsoft.
The EC said it would look to see whether legal cases against Apple's iPad and iPhone products and Microsoft's Xbox and Windows products, contravene European competition law by distorting the internal market through the abuse of industry standard patents.
"The Commission will investigate, in particular, whether by seeking and enforcing injunctions on the basis of patents it had declared essential to produce standard-compliant products, Motorola has failed to honour its irrevocable commitments made to standard setting organisations," it said.
"In these commitments, Motorola engaged to license those standard-essential patents on fair, reasonable and non-discriminatory (FRAND) terms. The Commission will examine whether Motorola's behaviour amounts to an abuse of a dominant market position."
Motorola said that it believes it will be able to prove to the EC that its stance is legal and would help regulators however possible.
"Motorola is confident that a thorough investigation will demonstrate that it has honoured its FRAND obligations and complied with anti-trust laws. Motorola will continue to work closely with the EC to resolve this matter as soon as practicable," it said.
The investigation comes as Google looks set to complete its $12.5bn acquisition of Motorola, which has already been approved by both European and US regulators, with the warning that any abuse of patent holdings would be watched closely.
Google said that while it does not own Motorola yet it would help the EC with its investigation as and where possible and made a subtle dig at Microsoft over the way it believes it is targeting firms using the Android system into signing licensing deals.
"We haven't finalised our acquisition of Motorola but will work with the EC to answer any questions they might have," a spokesperson said.
"We have longstanding concerns about patent abuses, including lawsuits and royalty demands targeting the Android ecosystem."
V3 also contacted Apple and Microsoft for comment but the former declined the comment and the latter had not replied at time of publication.
The announcement comes on the same day that Microsoft confirmed it was moving some of its manufacturing operations from Germany to the Netherlands in order to avoid the potential disruption caused by Motorola's tactics.
Cotton seedling freezes to death as Chang'e-4 shuts down for the Moon's 14-day lunar night
Fortnite easily out-earns PUBG, Assassin's Creed Odyssey and Red Dead Redemption 2 in 2018
Meteor showers as a service will be visible for about 100 kilometres in all directions
Saturn's rings only formed in the past 100 million years, suggests analysis of Cassini space probe data
New findings contradict conventional belief that Saturn's rings were formed along with the planet about 4.5 billion years ago