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• This means a problem facing a particular technical area that has gone unsolved for a prolonged period. The presumption is if the solution had been obvious to those skilled in the art, they would have solved the problem.

  Arnold Silverman and George Stacey - Cite This Source - This Definition
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  Cite Definition for long-felt need

  American Psychological Association (APA)

  long-felt need. (n.d.). Understanding "Patentese" - A Patent Glossary. Retrieved March 27, 2023, from website: http://www.expertglossary.com/definition/long-felt-need.

  Chicago Manual of Style (CMS)

  long-felt need. www.tms.org. Understanding "Patentese" - A Patent Glossary. Arnold Silverman and George Stacey. http://www.expertglossary.com/definition/long-felt-need (accessed: March 27, 2023).

  Modern Language Association (MLA)

  "long-felt need." Understanding "Patentese" - A Patent Glossary. Arnold Silverman and George Stacey. 27 March. 2023 http://www.expertglossary.com/definition/long-felt-need.

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