Engadget has spotted two patents filed by Sony that look like a cellphone and keyboard attachment for the PSP.
In two filings dated November 10, 2004 (and made public in late February 2006 and only three days ago, respectively), a gaggle of Sony designers submitted applications for both “ornamental design[s]” for a keyboard and phone add-on for the PSP — and trust us, the patent filings couldn’t have been much less verbose. So will we ever see these things get manufactured and released? Eh, even though Sony’s launched some unexpected PSP accessories recently, we’d assume the phone attachment won’t ever take off. However, Izumi Kawanishi has made it no secret that he wants email on the PSP, and a keyboard would be quite a nicety if that’s in the cards.