If you have a new idea for something unique that you want to manufacture, make sure you have a good grasp on patent law before you start.
One of my friends works with patents for his research company and when I asked him what he thought about getting a patent for a new idea he told me I needed to make sure I knew what I was doing before I even applied.
Applying is important, but it can be lengthy and expensive and if you don't do it properly, it can also be pointless.
For example, if you don't cover all the ways in which your idea can be exploited on the application, another company can come in and do this and then your patent will mean nothing.
If you are planning to get a patent for the item you want to manufacture, make sure you either do a lot of research or get someone who knows what they're doing to help you.