Today KEI hosted a side event at WIPO on the United States use of FAR 52.227-1. These are the slides I used.Slide 11 provides a link to more than 350 contracts that have his clause for a variety of purposes.
The Federal Acquisition Regulation (FAR) is the primary regulation for use by all executive agencies in their acquisition of supplies and services with appropriated funds. The FAR also contains standard solicitation provisions and contract clauses and the various agency FAR supplements.
KEI collection of contracts with FAR 52.227-1 (link)