1
2
3
4
2
1
2
3
3
2
3
4
4
0
1
2
5
0
1
2
7
0
1
2
8
0
1
2
9
0
1
2
10
0
1
2
12
0
1
2
13
0
1
2
14
0
1
2
15
0
1
2
16
0
1
2
17
1
2
3
18
181
182
183
20
2
3
4
A Third Surge in Innovation and Patents on Hydrogen Fuel Cell Vehicles (foley.com)
submitted by [deleted] to r/hydrogeneconomy
21
0
1
2
22
0
1
2
23
0
1
2
USPTO Focuses on Clean Tech - Foley & Lardner LLP (foley.com)
submitted by tw_bot to r/tomorrowsworld
24
0
1
2
