Nokia attempts to stop BlackBerry sales after obvious dispute.

Nokia made the disclosure by submitting a US court filing that demanded enforcement of the ruling that RIM infringed using a Nokia patent by including WLAN in its Cell phone handsets.

According to Nokia the particular ruling was that RIM could not manufacture or sell any WLAN product without paying out royalties first, and so it has filed cases in the us, Canada and the UK for the ruling to be enforced - which may mean a sales bar on BlackBerry handsets.

It really needs to be said the squabble comes at the remarkably bad time regarding both companies. Nokia is struggling in order to capture a foothold inside the smartphone market, despite recent releases such as the Nokia Lumia 920 along with the Nokia Lumia 820.

Meanwhile BlackBerry continues to reduce ground to companies Apple and Samsung, and is also heavily relying on the revolutionary BlackBerry 10 operating system that has been originally slated to appear this autumn but has been pushed back to earlier next year.

So far RIM has yet respond to Nokia .