紧急求助翻译：an obligation of assignment

...is described in the U.S. patent application No. ###， entitled, \"###\", filed on April 2, 2002, which is subjected to an obligation of assignment to the same entity, and which is incorporated by reference herein in its entirety by this reference thereto.

中间那句“is subjected to an obligation of assignment to the same entity\" 是什么意思？

有义务分配到相同的主体

有义务转让给相同实体

强制转让给相同实体

其义务性转让给相同实体

义务转让给同一单位