Amazon's controversial 1-click patent has been approved, after nearly four years of re-examination. The USPTO approved the online retailer's patent but added a limitation that requires the one-click system to operate in conjunction with a shopping cart model. Other e-commerce retailers would need to use both a shopping cart model, likely to be of the non-1-click variety, as well as a 1-click version. Because most online retailers use shopping carts, the limitation should have little impact on the patent's power.
