Topaz ClipGem USB.Code:T-C912-HSB-R.ClipGem USB Topaz ClipGem Serial. Code: T C912 HSB R. Portable electronic signature solution for full sized paper forms. ClipGem is a letter sized electronic signature capture clipboard for use wherever one party desires a paper copy or receipt in addition to an electronic copy. Thin and lightweight, ClipGem signature pad is a great choice for use in the field as it is powered only by your computer's serial port. #Serial Connectivity # Ink Pen Nib