As for InterDigital, and other similar patent holders, it's a question of whether the inventions are sufficiently important. Can they, for example, be used to block Nortel's?

对于InterDigital和一些相似的专利所有者来说，存在一个问题就是是否专利发明是十分重要的，例如，这些专利发明能够阻止Nortel的破产吗？

youdao

We have patented our Methyl Block delivery method and this time we will Sue anyone that tries to rip off our patent protected delivery system!

我们有我们的专利甲基块传输方式，这一次，我们将起诉任何人，试图撕裂了我们的专利保护提供系统！

youdao

This is true despite the fact that prior to filing a patent application a thorough search is typically performed, looking for any publication that might block a patent from issuing, and that a patent application is only filed when chances for obtaining a patent appear good.

FORBES: Keep the Current Standard for Invalidating a Patent

Some patent examiners have been at the patent office for decades, and have a vast storehouse of knowledge regarding what has previously been described in a printed publication (and thereby serves to block a patent grant).

FORBES: Keep the Current Standard for Invalidating a Patent

Amgen is trying to block Roche by suing the company for patent infringement.

FORBES: Magazine Article