Bristol litigation firm David Grist Solicitors and St John's Chambers have both shared a £70,000 boost in fees this August after representing shoe distributor Heelys in an aggressive patent enforcement campaign.
Heelys creates trainers with wheels in the soles, which can be used as roller skates.
Heelys director Charlie Allen told The Lawyer: "I don't care how much I spend on lawyers' bills, I'm taking anyone who copies the shoes to the High Court."
Heelys has already proceeded with five patent infringement cases in the High Court within the past three months, having seized 1,700 pairs of illegally manufactured shoes.
Paul Honess, a partner at David Grist, did not wish to comment, but said the patent campaign would continue.
Allen says he expects his business to grow by 500 per cent next year as a craze for Heelys trainers grips the nation's youth.