| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to have [be] invented [prep] | 7 |
|
| 2 | to have [been] invented [prep] | 7 |
|
| 3 | to have be invented [prep] | 7 |
|
| 4 | to have been invented [prep] | 7 |
|
| 5 | to have [be] invented by | 6 |
|
| 6 | to have [be] invented by | 6 |
|
