The iPad’s a confirmed success. Apple can’t make the things fast enough, and they’re vanishing from shelves worldwide. Another thing that’s vanished is the ‘pad’ jokes, comparing Apple’s device to sanitary products. This sort of thing tends to be the case when a device is successful—the same thing happened to the Wii.

What’s more interesting is how ‘pad’ now might become a generic term over ‘tablet’ for similar devices. Engadget reports that HP’s filed for the PalmPad trademark and Pocket-lint notes that RIM’s grabbed Blackpad.com.

These might be defensive moves, but perhaps these companies are bright enough to take advantage of Apple’s branding success, using names that would immediately get consumers thinking of the iPad, but selling devices that are more ‘open’ or more geared towards enterprise. That said, don’t expect Microsoft to reveal the Windows PhonePad 7 any time soon.