NOTE 7INTANGIBLE ASSETS

Intangible assets were as follows:

(In thousands)	June 28,		December 28,
	2014		2013
Intangible assets subject to amortization:
Developed technology, net of accumulated amortization of $15,647 and $14,079 as of June 28, 2014 and December 28, 2013, respectively	$	25,195	$	26,805
Customer relationships, net of accumulated amortization of $35,401 and $32,614 as of June 28, 2014 and December 28, 2013, respectively	10,998		13,795
In-process research and development, net of accumulated amortization of $1,123 and $759 as of June 28, 2014 and December 28, 2013, respectively	6,794		7,162
Other, net of accumulated amortization of $6,461 and $6,324 as of June 28, 2014 and December 28, 2013, respectively	1,114		1,275
	44,101		49,037
Intangible assets not subject to amortization:
Trademarks and trade names	18,305		18,305
Intangible assets, net	$	62,406	$	67,342

Developed technology is amortized on a straight line basis over 10 to 20 years, depending on the life of the product technology. Intangible assets related to customer relationships are generally amortized over a period of up to 10 years on an accelerated basis. In-process research and development is amortized on a straight line basis over the product’s estimated useful life upon completion of the technology. Other intangible assets include acquired backlog, product trademarks and trade names, non-competition agreements and defensible assets. With the exception of product trademarks and trade names, such assets are amortized on a straight line basis over a period of three months to 10 years, depending on the asset. Trademarks and trade names associated with products are amortized on a straight line basis over the estimated remaining life of the product technology, which ranges from 10 to 20 years. Trademarks and trade names associated with a business have indefinite lives and are not amortized.

Amortization expense related to intangible assets totaled $2.4 million and $4.9 million for the three and six months ended June 28, 2014, respectively, and $2.6 million and $5.1 million for the three and six months ended June 29, 2013, respectively.

Estimated aggregate amortization expense for future fiscal years is as follows:

(In thousands)	Estimated Aggregate Amortization Expense
2014 (remaining)	$	3,665
2015	6,937
2016	6,552
2017	5,569
2018	3,445
Thereafter	17,499
	$	43,667

The Company has excluded $0.4 million of estimated amortization expense related to certain in-process research and development from the table above, as it was uncertain as of June 28, 2014 when the technology will be completed and when the amortization will begin.