Two questions, two searches
A patentability search looks for prior art, which reaches well beyond issued patents to published applications, foreign filings, academic papers, product manuals, websites, and anything else made public. Its aim is to judge whether your invention is new and more than an obvious step from what came before. A freedom-to-operate search asks something else entirely: whether any patent still in force in the countries where you make or sell the product has claims that read on it. A patent that has expired, or one granted only in another country, may matter for patentability while posing no infringement risk where you sell. Mixing the two questions up is one of the commonest reasons a search ends up being paid for twice.
Your own disclosures count
Inventors are sometimes surprised that their own pitch deck, crowdfunding page, conference talk, or product launch can become prior art against them. United States law gives inventors a limited grace period for some of their own disclosures, but many other countries give little or none, so a public reveal before filing can close off foreign protection. If anything has already been shown publicly, tell your lawyer exactly what, when, and to whom. Once an application is filed, applicants owe the USPTO a duty of candor, which includes disclosing known information material to patentability, so what a search turns up does not simply disappear from the picture.
Using a search well
No search is complete, and a clean result reflects how carefully someone looked rather than a promise. The value lies in reading the closest references and asking how your claims could be drafted to stand apart from them, or how a product design could be adjusted to stay clear. Because a company's knowledge of a specific patent can matter later if infringement is ever alleged, many businesses route clearance work through counsel so that the analysis and its conclusions are handled with care. In a first conversation we work out which question you are actually asking, which markets matter, and how much depth the decision in front of you justifies.
