Patent applications are worldwide patent applications filed through the Patent Cooperation Treaty procedure or with a national patent office.
| Date | Value | Change, % |
|---|---|---|
| 2000 | 3 | 200.00% |
| 1999 | 1 | -50.00% |
| 1998 | 2 | 0.00% |
| 1997 | 2 | 0.00% |
| 1996 | 2 | 100.00% |
| 1995 | 1 | 0.00% |
| 1994 | 1 | -66.67% |
| 1993 | 3 | 50.00% |
| 1992 | 2 | 100.00% |
| 1991 | 1 | 0.00% |
| 1989 | 1 | 0.00% |
| 1988 | 1 |
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