Just a simple understanding based on the meaning of your question:
If there is an agreement that it belongs to employees or is shared, it belongs to employees or is shared!
If there is no reservation, it will be returned to the unit!
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The specific provisions are as follows:
Article 6: Performing the tasks of the unit or mainly using the material technology of the unit The invention-creation completed under the conditions is a service invention-creation. The right to apply for a patent for a service invention-creation belongs to the unit; after the application is approved, the unit becomes the patentee.
For non-service inventions and creations, the right to apply for a patent belongs to the inventor or designer; after the application is approved, the inventor or designer becomes the patentee.
For inventions and creations completed by utilizing the unit’s material and technical conditions, if the unit has a contract with the inventor or designer and stipulates the right to apply for a patent and the ownership of the patent right, such agreement shall prevail.
Article 12 The term "service inventions and creations completed in the execution of the tasks of the unit" as mentioned in Article 6 of the Patent Law refers to:
(1) Inventions made in the course of one's own work Creations;
(2) Inventions and creations made by performing tasks other than the duties assigned by the unit;
(3) After retirement, transfer from the original unit or labor or personnel Inventions and creations made within one year after the termination of the relationship and related to the original work undertaken by the original unit or the tasks assigned by the original unit.
The unit referred to in Article 6 of the Patent Law includes temporary work units; the material and technical conditions of the unit referred to in Article 6 of the Patent Law refer to the unit’s funds, equipment, parts, raw materials or Technical information not disclosed to the public, etc.