Practical new type: A kind of single-end isolated explosion-proof HV AC vacuum switch fixed on the wall

Patent Certificate for Practical New Type

No. 666508

Title of practical new type: A kind of single-end isolated explosion-proof HV AC vacuum switch fixed on the wall

Designer: Chen Mingjie, Liang Xiuli, Zhang Guohang, Qiu Jun, Qin Yisong, Jiu Wanlun, Gao Xingfa, Hu Jian, Zheng Baozhong, Zhou Yong, Zhang Tiejun, Wang Gang

Patent No. ZL 2003 2 0115576X

Date of patent application: Oct 24, 2003

Patentee: WISCO

Authorized release date: Dec. 22, 2004

This practical new type has been examined and reviewed by the office according to patent law, and it decides to grant this patent right, which shall be issued and registered on the patent registration book, patent right shall take effect from the date of authorized release of this patent right.

Time limit for this patent right is 10 years, calculated from the date of application, patentee shall pay annual fees according to patent law and execution regulations, time limit for paying the yearly patent fee is one month before every Oct 24, if not paying the annual fee according to the regulation, patent right shall be terminated from the date of expiration of paying the annual fee.

The patent certificate records the legal status during handling the patent registration, transfer and mortgage, annulling, invalidation and termination of the patent right, amendment of name or title, nationality and address of the patentee and other matters shall be recorded in the patent registration book.

No. 571944

Director: Wang Jingchuan (signature)

Feb. 2, 2004

National Intellectual Property Right Bureau of P. R. China (seal)