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Sonderhoff & Einsel (Beijing) Patent Agency Office
Suite 316
China World Office No 1
No 1 Jianguomenwai Ave
Chaoyang District
Beijing 100004
China（北京市朝阳区建国门外大街1号 国贸写字楼1座316号）
Tel +86-10-6505-5213
Fax +86-10-6505-6747
Email patent@sonderhoff-einsel.cn
Office Hours
Monday – Friday
from 9:00 to 17:30
(local time in Beijing)
Time difference and daylight-saving time
To GMT (UTC):
Normal time difference:
GMT +7
During daylight saving time:
GMT +6
To EST/EDT:
Normal time difference:
EST +13
During daylight saving time:
DST +12