Back Bone was a French aircraft manufacturer based in Tallard and founded by Thierry Simonet.
The company specialized in the design and manufacture of paramotors in the form of ready-to-fly aircraft for the US FAR 103 Ultralight Vehicles rules and the European microlight regulations.
[1] The company was active in the mid-2000s, but seems to have gone out of business by 2015.
[1][2] The company produced a line of paramotors that included the Seraph, Shadow and Silver models.
[1]