From the Institut für Computerlinguistik:

PatTR is a sentence-parallel corpus extracted from the MAREC patent collection. The current version contains more than 22 million German-English and 18 million French-English parallel sentences collected from all patent text sections as well as 5 million German-French sentence pairs from patent titles, abstracts and claims.

Of interest to patent translators. A whopping 22 million sentence pairs German-English and 18 million French-English:

Thanks to Patrick Roye