The broken lines depict unclaimed environmental subject matter.
The broken lines depict unclaimed environmental subject matter.
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Number | Date | Country |
---|---|---|
1039429 | Sep 1958 | DE |
3807127 | Sep 1989 | DE |
0310516 | Apr 1989 | EP |
1356398 | Feb 1964 | FR |
2109213 | May 1972 | FR |
2186839 | Jan 1974 | FR |
2427107 | Dec 1979 | FR |
2576518 | Aug 1986 | FR |
2061490 | May 1981 | GB |
9942186 | Aug 1999 | WO |
0120489 | Mar 2001 | WO |