A few weeks ago, Purple Leaf sued Google over the company's Google Checkout service and PayPal. And also filed similar patent lawsuits againts Fiserv, JP Morgan Chase, CitiGroup, American Express Company, PNC Bank and SAP America. Now, the Patent Leaf is after Amazon, accusing the e-commerce giant of infringing on its "311 patent" via Amazon's Payments product.
According to the complaint, Purple Leaf's 311 Patent generally relates to methods and system for an electronic transaction based on a receipt having payment remittance information. Purple Leaf maintains that Amazon Payments, the company's payments platform used by online merchants, infringes upon this patent.
Specifically, the Purple Leaf patent # 7,603,311 B1 covers a business method for conducting electronic transactions and claims to provide a more effective and efficient way to make a payment over the Internet.
As a side note, Amazon holds a number of other patents related to online payment, including its famous one-click payments patent in the U.S. (the company has been denied the intellectual property in Europe).
Here's the compalint in its full entirety: