DuPont and Monsanto Company have agreed to dismiss patent infringement lawsuits against each other over some seed development technologies.

Monsanto had alleged that DuPont infringed some of its seed chipping patents, while DuPont had claimed that Monsanto infringed some patents related to seed processing.

The companies did not disclose the terms of the settlement prior to Christmas.

DuPont and smaller rival Monsanto together dominate the U.S. seed industry. The two companies have been racing to develop improved crops through the use of genetic modifications and other means.

The companies reached a licensing agreement last year, agreeing to drop certain antitrust and patent claims against each other.