HONGYAN ZHANG

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Wuxi City, CN

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Patents Grantslast 30 patents

Information Patent Grant
Core lifter
- Patent number 10,612,308
- Issue date Apr 7, 2020
- BLY IP INC.
- Christopher L. Drenth
- E21 - EARTH DRILLING MINING
Information Patent Grant
Core lifter
- Patent number 8,770,320
- Issue date Jul 8, 2014
- Longyear TM, Inc.
- Christopher L. Drenth
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Grant
Core lifter
- Patent number D644673
- Issue date Sep 6, 2011
- Longyear TM, Inc.
- Christopher L. Drenth
- D15 - Machines not elsewhere specified
Information Patent Grant
Core lifter
- Patent number D625346
- Issue date Oct 12, 2010
- Longyear TM, Inc.
- Christopher L. Drenth
- D15 - Machines not elsewhere specified
Information Patent Grant
Core lifter
- Patent number D620959
- Issue date Aug 3, 2010
- Longyear TM, Inc.
- Christopher L. Drenth
- D15 - Machines not elsewhere specified

Patents Applicationslast 30 patents

Information Patent Application
CORE LIFTER
- Publication number 20170284160
- Publication date Oct 5, 2017
- BLY IP INC.
- CHRISTOPHER L. DRENTH
- E21 - EARTH DRILLING MINING
Information Patent Application
CORE LIFTER
- Publication number 20140318206
- Publication date Oct 30, 2014
- CHRISTOPHER L. DRENTH
- E21 - EARTH DRILLING MINING
Information Patent Application
CORE LIFTER
- Publication number 20110100718
- Publication date May 5, 2011
- Longyear TM, Inc.
- Christopher L. Drenth
- E21 - EARTH DRILLING MINING