The broken lines in the drawings depict unclaimed environmental subject matter.
The broken lines in the drawings depict unclaimed environmental subject matter.
| Number | Name | Date | Kind |
|---|---|---|---|
| 6056034 | Matnick | May 2000 | A |
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| 6886619 | Gonzaga | May 2005 | B2 |
| 7089987 | Gonzaga | Aug 2006 | B2 |
| 7404427 | Hillman et al. | Jul 2008 | B2 |
| 7438109 | Cunningham | Oct 2008 | B2 |
| 8333228 | Cunningham | Dec 2012 | B1 |
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| 8613303 | Hanneken et al. | Dec 2013 | B1 |
| 8770254 | Hanneken et al. | Jul 2014 | B1 |
| 8776858 | Corghi | Jul 2014 | B2 |
| 8783326 | Vaninger et al. | Jul 2014 | B1 |
| 8943880 | Vignoli | Feb 2015 |