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At first look sanitary napkins seem all very similar. They are all made of a central chassis, usually straight or slightly contoured, and a pair of "wings" to position the product on the user's underwear.
Each bag of sanitary napkins in US has printed a list of patent that are relevant to that product. In order to make a list of the most "important" patents related to sanitary napkins we carried out a short review among some shops in US.
We spotted the most famous brand, some second brand or private label product as well and took note of each patent listed on them. What we collected is a nice list, hereunder enclosed, showing some trends in the market.
Manufacturers try to protect specifically