The phrase "additional trademarks" is correct and usable in written English.
You can use it when referring to extra or supplementary trademarks that are relevant to a particular context or discussion.
Example: "The company has registered additional trademarks to protect its new product line."
Alternatives: "further trademarks" or "extra trademarks".
The governor also said that the association registered additional trademarks for the "sole benefit" of the association "rather than the Port Authority".
And while she shut down her namesake label, first daughter Ivanka Trump received preliminary approval from China for five additional trademarks, resulting from applications filed in 2016 and 2017.
(It's worth mentioning that these trademarks were approved on the same day that Chinese president Xi Jinping visited the Trump resort in Mar-a-Lago in Florida to hang with Ivanka's father, and that she has additional trademarks in Japan and Canada two countries whose leaders she met with in November and February).
Nescher also points out that the Slickcraft name is usually accompanied by the additional trademark AMF.
Finally, misappropriation is a highly unstable, but potentially fruitful source of additional trademark-related claims.
From @CREWcrew's Caroline Zhang: Ivanka Trump's business has received six additional valuable trademarks from China.
It charges for additional services like trademark changes or transfers and copyright applications, with prices starting from 500 yuan (about $80).
For clarification or additional information, see the Trademark primer materials.
In addition, it examines the relevance of trademarks and standards as additional technological indicators.
Second, what will be the trademark implications of additional gTLDs - will it help or hurt the situation?
Furthermore, the lawsuit said they misled the government again last September, when a week after receiving the notice of eviction, they filed additional documentation with the federal trademark office certifying they had been using the name Swanky Frank's commercially for five years without objection.
