ABC's Brian Ross reports on serious injuries suffered from hitting a Trinity Industries guardrail from the end, possibly due to a profit-driven redesign; the company responds, cites a patent dispute and the Feds announce a nationwide review.

In response, the company released a statement, two documents and a video.

Trinity has a high degree of confidence in the performance and integrity of the ET-Plus® System, which we are proud to manufacture and sell under license from Texas A&M University. The false and misleading allegations being made by Mr. Harman were reviewed by the Federal Highway Administration (FHWA). The FHWA re-affirmed its acceptance of the ET-Plus® System in October 2012 and yet again in June 2014 for its eligibility for use on the National Highway System.

A lawsuit was brought by Trinity and Texas A&M for infringement of the patents covering the ET-Plus® System. During this patent lawsuit, Mr. Harman filed his own lawsuit against Trinity based on allegations of "false claims" associated with the ET-Plus® System. The U.S. Government reviewed his "false claim" allegations and declined to participate in the lawsuit. Trinity is defending itself against the individual making these allegations in court and is taking the steps necessary to fully protect the intellectual property of Texas A&M and the outstanding reputation of Trinity Highway Products and the ET-Plus® System.

Obviously there have been injuries from guardrails, though it's unclear if Ross knows the cause.

Embedded below is the full segment from 20/20, previewed in the first clip.

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