The next time you pick up your Latte at Starbucks be sure to read the printing on the insulating sleeve that they put on the cup:

"Careful,the beverage you're about to enjoy is extremely hot. This insulating sleeve is made from 60% post-consumer recycled fiber and uses approximately 45% less material than a second paper cup

©1998 Starbucks Coffee Company. All rights reserved. US Patent No. 5,205,473 ".

Is that cardboard sleeve a great invention or an example of a patent system gone crazy? Well it seems that lots of inventors think think this patent owned by LBP Manufacturing is relevant prior art.

This IPVision Patent Landscape Map™ shows the 81 patents that cite US Patent 5,205,473 "Recyclable corregated beverage container and holder."