Zippo Lighter announced that its has recently received a trademark registration for the shape of its lighters.  It distributed the picture (top above).  I looked at the PTO database and can’t find the registration to which they refer (another reminder that databases can be incomplete), but I did find their two-year old registration of a two-dimensional drawing of a lighter (above).  Zippo also has an abandoned application for the sound a Zippo makes when opening.