Qi Han

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Indexable face milling cutting insert and face milling cutting head...
- Patent number 11,311,949
- Issue date Apr 26, 2022
- BEIJING WORLDIA DIAMOND TOOLS CO., LTD.
- Zongchao Zhang
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Vertically-mounted milling cutter insert and multitooth milling cutter
- Patent number 10,220,450
- Issue date Mar 5, 2019
- BEIJING WORLDIA DIAMOND TOOLS CO., LTD
- Zongchao Zhang
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Polypropylene microporous film
- Patent number 5,134,174
- Issue date Jul 28, 1992
- Institute of Chemistry, Academia Sinica
- Mao Xu
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Patents Applicationslast 30 patents

Information Patent Application
INDEXABLE FACE MILLING CUTTING INSERT AND FACE MILLING CUTTING HEAD...
- Publication number 20200122247
- Publication date Apr 23, 2020
- Zongchao ZHANG
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
VERTICALLY-MOUNTED MILLING CUTTER INSERT AND MULTITOOTH MILLING CUTTER
- Publication number 20170197256
- Publication date Jul 13, 2017
- BEIJING WORLDIA DIAMOND TOOLS CO., LTD
- Zongchao ZHANG
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR