The broken lines in the drawings depict unclaimed environmental subject matter.
The broken lines in the drawings depict unclaimed environmental subject matter.
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| Number | Date | Country | |
|---|---|---|---|
| Parent | 29246750 | May 2006 | US |
| Child | 29284838 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 29229675 | May 2005 | US |
| Child | 29246750 | US |