A patent is an interesting concept that has involved from the middle ages.Back then it was documented rating ......by the king.And it had involved into a right that is granted to the inventors by the lord of the country.It's actual a kind of protection for inventors to ensure they have a chance to make a profit from inventions which will reward them for the time,money and energy they spent developping it.This will make the reward ......go around.If ......is to continue successfully,they must provide good services to buy news.Realistically,we will not buy the same things over and over,year after year.What we will buy is new and improved models which are very ancient the same thing.They may be bigger,smaller,different colors,round......The types of changes are endless,so we need to keep model.Think about it.Every year,things change.Cars,clothing,housing,......forniture,luggage,......to mention just a few.They do the same thing for......no matter the color or shape.It us the same for the car.In a lot of cases,everything ......again.In order to fuel this cycle.Incentives must be provided to those who assist ......inventors.How do they make money?Patents are ,in fact ,society's contract with inventors.Once granted,they can be bought,sold,licensed,exchanged and given away.Patents are no less intellectual property and recognised as being intangeble which means although they can't be touched,they are non-asset.There are other catagories that are into intellectual property:trade marks,copy rights,trade secrets,but we are not concerned with them now.