11. INTANGIBLE ASSETS The table below provides details of acquired intangible assets: | | | | 30 September 2013 | | | | | 30 September 2012 | | | | | | | | Accumulated | | | | | | | | | Accumulated | | | | | | | Gross | | | Amortization | | | Net | | | Gross | | | Amortization | | | Net | Customer relationships | | $ | 629.2 | | $ | (97.3) | | $ | 531.9 | | $ | 665.3 | | $ | (93.1) | | $ | 572.2 | Patents and technology | | | 91.3 | | | (52.1) | | | 39.2 | | | 129.8 | | | (82.0) | | | 47.8 | Other | | | 91.5 | | | (35.9) | | | 55.6 | | | 82.3 | | | (38.4) | | | 43.9 | Trade names and trademarks | | | 90.6 | | | - | | | 90.6 | | | 97.7 | | | - | | | 97.7 | | | $ | 902.6 | | $ | (185.3) | | $ | 717.3 | | $ | 975.1 | | $ | (213.5) | | $ | 761.6 | | | | | | | | | | | | | | | | | | | | Refer to Note 1, Major Accounting Policies, for amortization periods associated with our intangible assets. |
Amortization expense for intangible assets was $42.3, $27.1, and $22.6 in 2013, 2012, and 2011, respectively. Projected annual amortization expense for intangible assets as of 30 September 2013 is as follows: | | | | | | 2014 | $ | 41.9 | 2015 | | 40.1 | 2016 | | 38.0 | 2017 | | 36.6 | 2018 | | 34.8 | Thereafter | | 435.3 | | $ | 626.7 |
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