A patented invention must be novel. Disclosure to the public before filing a patent application, even to a single third person without a confidentiality agreement, can destroy novelty. For example, one of DJI’s patents was invalidated by its own public marketing announcement of the claimed invention before the patent filing. Therefore, companies should manage disclosure and confidentiality relating to any subject matter that may be patentable, such as at conferences, trade shows, or pitches to partners. In some jurisdictions, e.g., in the United States and Canada, there is a grace period for an inventor’s own prior disclosure. That is, an inventor can disclose to the public his invention and could still obtain a patent in the United States and Canada on that invention if the patent application is filed within a year after the public disclosure. In the United States, there is a separate on-sale bar, i.e., if you have sold your invention for over a year, even if the invention is in a “black box”, it will be too late for you to apply in the U.S. for a patent.