how to check if an idea has been patented
There is no EASY way. If your invention is a new can opener, an existing patent for the same idea may never use the words can opener. For example, it may be described in broader terms: container de-sealer or metal wall scissor. The patent offices classification system helps a bit, but not much. Inventors tend not to want to find their invention, so, they type in --can opener-- and look at a few and say they couldn't find it. You have to look for it like you want to find it. try different search terms. when you find one thats close, look at the references cited in that application and look for other patents wherein the close one was cited.How to Conduct a Patent Search
To get a basic understanding of patent searches read Searching For Students and in particular read Searching Using Key Words . It was written for students; however, if you can look past the cute language it will quickly get you reading and searching patents online within minutes. It will not be enough to do a diligent (complete) search for prior art by only using the Internet. For that you would need to understand the patent classification system and be prepared to do days or even weeks of research.Do A Patent Search Early In The Invention Process.
There is nothing more valuable than a patent search when you have a new idea. The reason a search is so valuable is that this single step can save the average inventor a fortune. Many times you will find your invention has already been patented. If that is the case and the patent is still active, i.e. less than 17-20 years old in most cases, you will either want to change your idea or start over with a new concept. Often there is no point in pursuing an idea that has already been patented if your idea infringes the patent. Your goal as an inventor should be to seek out reasons why your invention will not work and will not make you money. This is hard for most people to understand.What is reissue?
Patent law states "On taking up an application for examination or a patent in a reexamination proceeding, the examiner shall make a thorough study thereof and shall make a thorough investigation of the available prior art relating to the subject matter of the claimed invention." This means that prior art could disqualify your application for a patent.Patenting and USPTO Patent Applications - What is a patent? What kinds of patents are there? What is the USPTO?
Some people may confuse patents, copyrights, and trademarks. Although there may be some similarities, they are different and serve different purposes. Read What Do I Need? or Understanding Intellectual Property if you need to understand the differences better. Patents and trademarks are both issued by the USPTO.