Can it be improved? Download the file for free and see for yourself.
Improving a design as enduring as a paperclip sounds impossible, but i.materialise may have pulled it off. The Infinite Clip can clip onto things in four different directions and serve as a hook. It can clip onto thin and thick things, which has always been the weakness of normal paperclips.
The 3D file can be downloaded for free from Thingiverse if you want to try it for yourself with your favorite 3D printing service. Unfortunately, they claim it probably won’t work with a Makerbot since the curve needs to be supported.