| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 0 |
0%
|
| -8 | Refused | 0 |
0%
|
| 1 | Yes_ for a patent only | 2 |
40%
|
| 2 | Yes_ for a trademark only | 2 |
40%
|
| 3 | Yes_ for both a patent and a trademark | 0 |
0%
|
| 4 | No | 1 |
20%
|
| Sysmiss | 1990 |