Is my invention already patented?
Determine if your invention is novel by doing a "prior art" or patent search, find out if someone else has already patented your idea. An inventor or hired professional can conduct a search of the USPTO records.Who can apply for a patent?
A patent must be applied for only in the name(s) of the actual inventor(s). However, the inventor can sell or assign the patent to someone else. Prior art includes any patents related to your invention, any published articles about your invention, and any public demonstrations. This determines if your idea has been patented before or publicly disclosed making it unpatentable.Don't Talk About It
If the invention has been described in a printed publication anywhere in the world, or if it has been in public use or on sale in the United States before the date that the applicant made his/her invention, a patent cannot be obtained. If the invention has been described in a printed publication anywhere, or has been in public use or on sale in this country more than one year before the date on which an application for patent is filed in this country, a patent cannot be obtained. In this connection it is immaterial when the invention was made, or whether the printed publication or public use was by the inventor himself/herself or by someone else. If the inventor describes the invention in a printed publication or uses the invention publicly, or places it on sale, he/she must apply for a patent before one year has gone by, otherwise any right to a patent will be lost.The Poor Man's Patent is a Myth
One of the undying myths of Patent World is that there is such a thing as a Poor Man's Patent. If you've never heard of it, the poor man's patent involves writing out a description of your invention and mailing that description to yourself. The transmission of this description through the mail and the cancelling of the postage by the Post Office is supposed to establish a date of invention for you. That way if someone steals your invention or comes along and invents it independently, you have "proof" that you invented it first. The proof is in the sealed envelop and the date the postage was cancelled.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.