自登记之日
From the date of registration
以上为机器翻译结果，长、整句建议使用 人工翻译 。
质押合同自登记之日起生效。
The pledge contract shall become effective upon registration.
youdao
The pledge contract shall become effective on the date of the registration.
专利申请权或者专利权的转让自登记之日起生效。
The assignment shall take effect as of the date of registration.
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