The basic purpose of a patent is not the exclusive use.
The patent holder can decide if he wants exclusive use or not.
The basic purpose of a patent is to educate the world in how to do something better.
That is the reason why patents have to be completely described and illustrated.
I dont agree with that. The purpose of a patent is to create exclusive rights for the innovator to sell his invention. If a small innovative company spends its resources (time, money) into developing a product that can improve the world, a patent is there to give the innovator a chance to capitalize on his hard work. If a large and cumbersome organisation (which are generally speaking less innovative) can copy the work right off the bat and capitalize on someone elses creative work and beat them commercially by their larger resources, there is no incentive to develop anything new, by the smaller companies who are generally speaking the innovators.
Good example: Kemper patented the row independent corn head in 1983, the same year as i was born. I do not know of a contractor who didnt have a Kemper header in my youth, they were the dominant force.
John Deere bought them in 1997, and Claas and New Holland dealers were worried: If Deere would only sell them in green and yellow, and no longer make them available to competitors in orange and white, the dealers in my area knew that contractors would buy that Kemper header, no matter which chopper it was attached to. (Same like Cummins and Ram)
Without a patent, Kemper would probably have gone bankrupt if the chopper manufacturers stole their idea, sold it standard on every harvester they made, and thereby produced it cheaper by economy of scale, while Kemper never had the chance to sell enough units to earn back the R&D investment they put in.
www.kemper-stadtlohn.de
No mention of JD on the Kemper website, yet on the European Deere site, they proudly mention that their corn header is made by Kemper
In 1990 there was no self respecting contractor who didnt use a Kemper header, on any brand of forager, so eagerly was the Kemper header adopted in the market. When the patent expired and the chopper manufacturers began building their own, the concept was introduced in North America, where it now also became the standard.
Since the Kemper patent expired, everyone began making them, and the row independent corn head has also become the standard in North America. The Deere takeover probably saved that company because they cancelled all other agricultural production in order to keep up with header demand... which means that they could have better did like Piet Zweegers did when he invented the drum mower in 1965: License it to the whole world, and make them put a sticker on each mower that says "system Zweegers"