How many patents does
Guangzhou Metro Corporation have?
patents
238
families
196
granted
43
applications
195
CN
238
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The report contains ten-year analysis with the following sections
- patent filing analysis
- worldwide filing analysis
- patent family analysis
- application analysis
- granted analysis
- classification analysis
- citation analysis
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Guangzhou Metro Corporation
Top ten assignees appearing on patents
2009 - 2018
2018
Guangzhou Metro Corporation
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| energy-feedback-type traction power supply device based on resonance control strategy | 2 | 2013 |
| device and method for measuring characteristic value of leakage water disease area of me… 🛈 | 2 | 2014 |
| high-power led panel lamp for metro lighting | 2 | 2010 |
| conductive contact surface performance mutual inductance isolating real-time online diag… 🛈 | 2 | 2011 |
| full-isolated real-time online diagnosis repairing system for conductive contact surface… 🛈 | 2 | 2011 |
| variable-frequency energy-saving method applied to whole-process temperature difference … 🛈 | 2 | 2015 |
| grease coating device for steel rail fasteners | 2 | 2015 |
| asymmetric passive optical fiber train bus topology structure and terminal interconnecti… 🛈 | 2 | 2015 |
| rolling bearing fault diagnosis method based on time-frequency domain multidimensional v… 🛈 | 2 | 2013 |
| automatic on-line quality diagnosis and repair system of long-distance train communicati… 🛈 | 2 | 2011 |