Patent number: ZL02252383.9 How long is the patent number valid? Is it overdue?

This utility model patent was applied in 2002 and will expire in June this year 10.

After 10, everyone can use it, and the existing technology is established.

thank you

Fully compatible super-long gap magnetic detection head

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Application number: 02252383.9 Application date: 2002- 10- 17.

A fully compatible super-long slot magnetic detection magnetic head is structurally characterized by mainly comprising a shell, a slot, an iron core, a middle magnetic core, an iron core seat, a bobbin, a terminal, a rear shield, a mounting frame and other parts. Wherein, an iron core, a middle magnetic core, an iron core seat and a spool are sequentially arranged in the shell, the terminal post is connected with the spool, and a rear shielding cover is arranged on one rear surface of the shell; Mounted on the rear shielding cover, which is also provided with a water outlet hole; There is a double gap at the intersection of the middle magnetic core and the shell; The magnetic head of the utility model is suitable for various horizontal and vertical money counters, with reasonable structure and strong practicability, and can also be popularized and applied to magnetic detection fields such as aerospace and industrial automation. Applicant: Shenzhen Electronic Industry Corporation Address: 5 18000 Inventors (designers): Luo Ruitao, Chen Bingjun, Liu Yezeng, Xu Chaojun, Zhou, main classification number: G07D7/04, and classification number: G07D7/04.