 
                 Patent Grant
 Patent Grant
                     D739029
 D739029
                    
    
    
    
    
    
    
    
| Number | Name | Date | Kind | 
|---|---|---|---|
| 4470409 | Prusmack | Sep 1984 | A | 
| 5885073 | Kussick | Mar 1999 | A | 
| 7159591 | Kussick | Jan 2007 | B2 | 
| 8387620 | Vaska et al. | Mar 2013 | B1 | 
| 20100065066 | Hamburg | Mar 2010 | A1 | 
| 20150079530 | Bergersen | Mar 2015 | A1 |