Note 7. Intangibles

The following table presents the gross carrying amount and accumulated amortization of intangible assets as of July 1, 2012 (in thousands):


	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Useful Life
Developed technology	$	40,200	$	16,053	$	24,147		5 years
In-process research and development		1,900		138		1,762		7 years
Customer relationships		17,600		1,948		15,652		11 years
Trademarks		5,200		519		4,681		10 years
Lease agreements		2,600		463		2,137		8 years

Total acquired intangible assets from Vocollect acquisition:		67,500		19,121		48,379

Other intangibles		14,459		10,228		4,231		5 years

Total	$	81,959	$	29,349	$	52,610

The following table presents the gross carrying amount and accumulated amortization of intangible assets as of December 31, 2011 (in thousands):


	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Useful Life
Developed technology	$	40,200	$	9,416	$	30,784		5 years
In-process research and development		1,900		—		1,900		7 years
Customer relationships		17,600		623		16,977		11 years
Trademarks		5,200		303		4,897		10 years
Lease agreements		2,600		245		2,355		8 years

Total acquired intangible assets from Vocollect acquisition:		67,500		10,587		56,913

Other intangibles		14,459		9,376		5,083		5 years

Total	$	81,959	$	19,963	$	61,996

Total amortization expense on intangibles for the three and six months ended July 1, 2012 was $4.7 and $9.4 million, respectively, and $3.3 and $4.3 million, for the three and six months ended July 3, 2011, respectively. Estimated future amortization expense for intangible assets for the next five years is as follows (in thousands):


Year	Amount
2012	$	18,558
2013		16,367
2014		8,865
2015		6,005
2016		3,482