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The Patent Marking Statute

By Paul A. Ragusa and Peter Withstandley
March 27, 2007

Since 1842, U.S. law has required patent owners to provide notice of their patent rights to the public by marking patented articles. The current statute, codified at 35 U.S.C. '287(a), permits patent owners to give notice to the public by marking a patented article (or its packaging when appropriate) with the word 'patent' or abbreviation 'pat' and the applicable patent number. The statute also provides that a failure to mark bars a patentee from obtaining damages for the period before it provided a defendant in a patent infringement action with actual notice of its infringement allegations. See Maxwell v. Baker, 86 F.3d 1098 (Fed. Cir. 1996). This can have a significant financial impact, as up to six years of potential damages may be lost.

Where a patent owner chooses to license its patents, the obligation to mark patented articles extends to its licensees. Nike, Inc. v. Wal-Mart Stores, Inc., 138 F.3d 1437, 1446 (Fed. Cir. 1998). Unfortunately, the patent owner rarely has access to the same information as its licensee concerning the licensee's business practices. Moreover, the patent owner's choice in determining what 'Licensed Products' can be made by its licensee, or even which claims should be licensed, may not be the final word in determining whether and to what extent the licensee should mark its products. What can a patent owner do to avoid the potentially harsh forfeiture of significant damages? Several suggestions are provided below.

The Patent Owner's Duty to Investigate

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