Cisco, who holds the trademark on the iPhone product name (and already sells an eponymous product) has decided to sue Apple in federal court for use of their trademark. This, after much discussion of Cisco and Apple coming to an agreement.

“Cisco entered into negotiations with Apple in good faith after Apple repeatedly asked permission to use Cisco’s iPhone name,” said Mark Chandler, Cisco senior vice president and general counsel, in a statement. “There is no doubt that Apple’s new phone is very exciting, but they should not be using our trademark without our permission.”

Whoopsie. Perhaps Apple can fax the paperwork back to them already and be done with it? (Though, if rumors of the agreement being of a per-unit-sold nature, we all know how reticent Apple is to pay into a royalty structure like that.)