Ranking Year:
# | Company Name | Region | Tech Topics | Total |
|---|
1 | Patent: 3 | |||
2 | Natural gas,Petroleum industry,Renewable energy, ...[+2] | Patent: 3 | ||
3 | Drill,Petroleum industry,Petroleum | Patent: 1 | ||
4 | Oil well,Mechanical engineering,Manufacturing engineering | Patent: 1 | ||
5 | Patent: 1 | |||
6 | Drilling engineering,Petroleum industry,Drilling fluid, ...[+2] | Patent: 1 | ||
7 | Pinyin,Architecture,Civil engineering, ...[+2] | Patent: 1 | ||
8 | Petroleum,Petroleum product,Petroleum industry | Patent: 1 | ||
9 | Patent: 1 | |||
10 | Patent: 1 |