70 inventions

29:35

4:01

13:33

10:13

5:06

9:51

18:32

17:48

14:26

10:46

10:48

13:00

7:48

10:01

11:09

1:17

9:59

16:54

5:53

21:32

42:18

10:03

5:53

12:57

10:25

10:30

11:51

12:36

17:45

9:27

4:45

10:22

11:14

4:40

4:40

5:35

5:47

2:56

12:11

23:54