German sportswear giant Adidas has filed a lawsuit against Skechers, accusing the US based footwear maker of copying the Springblade concept in its Mega Flex shoes.

The suit, filed in the US District Court for Portland, Oregon, seeks an injunction against any infringements and triple damages.

In the complaint, Adidas accuses Skechers of copying its Springblade technology in order to develop its own Mega Flex shoes, including Mega Blade 2.0 and Mega Blade 3.0.

Adidas first introduced the Springblade shoe in June 2013, and has since incorporated the technology into additional shoe designs, including the Springblade Ignite shoe which was launched in February 2015.

Now, Adidas claims Skechers has copied the design and features of the Springblade, from the angle of the blades to the material used, and has "acted with intentional and willful blindness to Adidas's patent rights".

This is the latest in a long-running series of lawsuits between the companies. Earlier this year Adidas obtained a preliminary injunction prohibiting Skechers from selling two footwear styles, and using the word 'Supernova' in a third, following a trademark lawsuit filed by the German sportswear giant in September 2014.

Adidas obtains injunction on Skechers shoes

And in September of last year Adidas filed a trademark lawsuit Skechers over alleged copyright infringement of its Stan Smith trainers.

Adidas files trademark suit against Skechers