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A great inventors help option is to hire a professional prototyper to create a working model of your new invention ideas. Although these services are expensive, they may save you money in the long run if your invention prototype is especially complicated.
Before beginning work with an invention prototyper, require that person to sign a nondisclosure agreement. Because you will be sharing all of the working details of your invention with this person, it is crucial that you protect your rights as an inventor.
Make sure you agree ahead of time about how much the prototyping will cost. If possible, get a flat fee for the entire project.