*'''Search''': Based on title, abstract and claims for some major companies in this field.
====Year wise IP activity====
*Based on title, abstract and claims for some major companies in this field.The graph is base on the patents of Kimberly-Clark Corp, Johnson & Johnson, Procter & Gamble, and Plytex from 1836 to 2006.
[[Image:graph.jpg|thumb|center|500px| Year wise IP activity]]