Here is one embossed Patent// Pending on the top around the opening. The embossing is upside-down. The patent for this LRI is shown here: http://reference.insulators.info/patents/detail/?patent=66054&type=U The color of this one is an uncommon dark green. It has a rather big bubble for an LRI-see photo. This was purchased in July 2000. This one has its original 'button' inside which has the tie-wire pass through it, and keeps the tie wire from popping out the top.