Lijun Ma

Follow

Person

Beijing, CN

People

Patents Grantslast 30 patents

Information Patent Grant
Method and electronic apparatus for implementing multi-operating sy...
- Patent number 9,342,243
- Issue date May 17, 2016
- Lenovo (Beijing) Co., Ltd.
- Weixian Guo
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Method and system for maintaining contact information
- Patent number 8,972,505
- Issue date Mar 3, 2015
- Sun Management, LLC
- Joe Zheng
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Method and system for maintaining contact information
- Publication number 20140156760
- Publication date Jun 5, 2014
- Mingoe Inc.
- Joe Zheng
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
METHOD AND ELECTRONIC APPARATUS FOR IMPLEMENTING MULTI-OPERATING SY...
- Publication number 20140149647
- Publication date May 29, 2014
- Lenevo (Beijing) Co., Ltd.
- Weixian Guo
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Multi-wavelength optical disc, apparatus and method for reading and...
- Publication number 20010038596
- Publication date Nov 8, 2001
- Duanyi Xu
- G11 - INFORMATION STORAGE