How long should a company retain intellectual property records like patents, trademarks, and invention disclosures?

Intellectual property (IP) records are among the most valuable assets a company owns, so they generally warrant long retention periods. Unlike routine business records that can be disposed of after a few years, IP records often need to be kept for the life of the right and well beyond.

Match Retention to the Life of the Right

A guiding principle is to retain core IP records for as long as the underlying right exists, plus a margin for enforcement and disputes.

• Patents: Retain core records (the granted patent, prosecution file, maintenance fee records) for at least the full term of the patent. Because infringement claims can arise late and statutes of limitations run from the date of harm, many organizations keep these records permanently.
• Trademarks: Because trademark rights can be renewed indefinitely as long as the mark is in use, the registration, specimens, and proof-of-use records should generally be retained permanently or for as long as the mark is active.
• Copyrights: Retain registration and authorship records for the full copyright term, which is long, so permanent retention is common.

Keep Invention Disclosures and Evidence Longer

Invention disclosures, lab notebooks, design records, and assignment agreements are critical evidence of ownership, inventorship, and the date of conception. These should typically be kept permanently, even for inventions that are never filed or are abandoned, because they may prove prior art, defend against later claims, or establish trade-secret protection.

Don’t Overlook Supporting Records

• License and assignment agreements: Retain for the life of the agreement plus the applicable contract statute of limitations.
• Litigation and enforcement files: Retain per legal hold and beyond final resolution.
• Tax and financial records tied to IP (such as amortization or royalty income) follow tax recordkeeping rules; the IRS advises keeping records that support an asset’s basis for as long as you own the asset, plus the relevant limitations period.

Build It Into a Schedule

Set these periods in a documented retention schedule and apply consistent practices, as recommended by recognized records management standards. When digitizing IP records for long-term keeping, preserve authenticity and metadata so the records remain trustworthy as evidence. See more on digitization and imaging.

Always confirm specific periods with legal counsel, since IP terms and limitations vary by jurisdiction.