PSP keyboard, cell phone patents filed

Sony has filed patents for with USPTO for a keyboard add-on and a cell phone attachment for the PSP. Engadget reports: "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."