Patent company Lodsys has extended its legal action against Apple developers for patent violations, but has said that it will pay the accused $1,000 apiece if the courts find against Lodsys.
The firm claims to own intellectual property which is being infringed by developers who include in-application purchasing systems in their software.
"We stand firm and restate our previous position that it is the third-party developers that are responsible for the infringement of Lodsys' patents, and they are responsible for securing the rights for their applications," the firm said in a blog post.
"Developers relying on Apple's letter [about having already licensed the technology] do so to their own detriment, and are strongly urged to review Apple's own developer agreements to determine the true extent of Apple's responsibilities to them."
Lodsys claimed that, under developer contracts with Apple, the most damages that developers can claim from the company is $50 per application. Developers would have to decide where their best interests lay, Lodsys said.
Lodsys has begun action against seven developers, five in the US, and one each in Vietnam and Sweden, and said that it had taken the legal action earlier than planned because of Apple's position.
As a sweetener, Lodsys has offered every developer it is taking action against a payment of $1,000 if the company loses its court case.
"We are willing to put our money where our mouth is and pay you something if we are wrong," the firm said.
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