Patent applications are worldwide patent applications filed through the Patent Cooperation Treaty procedure or with a national patent office.
| Date | Value | Change, % |
|---|---|---|
| 2007 | 3 | 0.00% |
| 2006 | 3 | -50.00% |
| 2005 | 6 | 50.00% |
| 2004 | 4 | -33.33% |
| 2003 | 6 | 200.00% |
| 2002 | 2 | 100.00% |
| 2001 | 1 | -83.33% |
| 2000 | 6 | 200.00% |
| 1999 | 2 | -71.43% |
| 1983 | 7 |
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