If the intellectual property rights have passed the protection period, imitation by others does not constitute infringement of other people’s intellectual property rights. For example, amlodipine besylate has expired the intellectual property protection period. Many domestic pharmaceutical companies have imitated the drug. Does not constitute infringement.

1. If the holder of intellectual property rights has died more than fifty years ago, it does not constitute infringement of intellectual property rights if others quote or even copy large sections of the original text, such as the works of Lu Xun, Marx, Engels, and Lenin , Stalin's works, anyone who quotes them in large quantities does not constitute infringement, and it does not constitute infringement with the written or oral consent of the original author. For example, if someone wants to use a screenshot from the work of a painter who is still alive to make a trademark pattern, he must contact the The artist communicated and obtained his consent, and the use of the trademark pattern does not constitute infringement.

2. If a trademark is acquired by others, the acquirer's use of the trademark does not constitute infringement. For example, a Dutch company acquired the trademark rights of "Peacock Color TV" in Suzhou City, Jiangsu Province, my country. The Dutch company used "Peacock" The trademark "Color TV" does not constitute infringement, and the TV manufacturing industry in Suzhou City cannot continue to use the trademark. Otherwise, the TV manufacturing industry in Suzhou City will constitute infringement. The holder of the intellectual property rights does not advocate the public use of its intellectual property rights. If payment is required, the user does not constitute infringement. For example, the inventors of various text input tools such as Ziguang Pinyin Input Method, Sogou Pinyin Input Method, QQ Pinyin Input Method, Wubi Input Method, etc., have not claimed that they require payment to use them, so the majority of Only netizens can use these input methods for free.