All of the broken lines in the accompanying drawings illustrate environmental structure and form no part of the claimed design.
All of the broken lines in the accompanying drawings illustrate environmental structure and form no part of the claimed design.
| Number | Name | Date | Kind |
|---|---|---|---|
| 2679972 | Brumme | Jun 1949 | A |
| 4164690 | Muller et al. | Aug 1979 | A |
| D289680 | Heob | May 1987 | S |
| D425612 | Andersen | May 2000 | S |
| D461550 | Hsin-mao | Aug 2002 | S |
| D539408 | Wu et al. | Mar 2007 | S |
| D636863 | Isoda et al. | Apr 2011 | S |
| 8056933 | Liptak | Nov 2011 | B2 |
| D667536 | Zengin | Sep 2012 | S |
| D669570 | Penlesky et al. | Oct 2012 | S |
| D669571 | Penlesky et al. | Oct 2012 | S |
| D681184 | Romero Carreras | Apr 2013 | S |
| D701299 | Oba | Mar 2014 | S |
| D701597 | DeFilippis | Mar 2014 | S |
| Entry |
|---|
| Drawing of Prior Art Utility Set Fan. |
| Drawing of Prior Art Belt Driven Tube Fan. |
| Drawing of Prior Art Bifurcated Fan. |