| Subject | English | Russian |
| econ. | challenge the patent | оспорить патент (Several years later, Henry Ford challenged the patent, eventually prevailing after an eight-year lawsuit, and the rest was history. A.Rezvov) |
| patents. | challenge the validity of the patent | оспорить действительность патента |
| gen. | challenge to the patent | возражение против выдачи патента (The Supreme Court, reviewing a challenge to the patent, held that Prometheus Labs had attempted to patent a law of nature that was inherently non-patentable. Alexander Demidov) |