What is a prior art reference?

A prior art reference is a legal term used in patent law, and it refers to any information or evidence that is already publicly known before a patent application is filed. In South Dakota, the prior art reference is used to show that the invention described in a patent application is not new or novel. This might include a published paper, manual, or other document that discloses the same invention. It could also include a prototype of the invention or a similar invention that was made before the patent application was filed. In order for a prior art reference to be valid, it must be accessible to the public and at least as old as the filing date of the patent application. If the prior art reference predates the patent application, then the patent may be considered invalid.

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