5 .	Intangible assets

The tables below present the balances of our intangible assets (in thousands, except for years):

	October 2 8 , 201 7
	Gross Value		Impairment			Accumulated Amortization and Effect of Currency Translation			Net Value		Weighted Average Remaining Amortization Period (Years)
Acquired intangible assets:
Developed technology	$	85,427	$	(24,614	)	$	(54,087	)	$	6,726		7.1
Customer relationships		54,505		(30,486	)		(21,305	)		2,714		5.0
Trademarks and other		4,078		-			(3,948	)		130		1.1
Purchased IP - amortizing		35,233		(6,716	)		(25,036	)		3,481		1.8
Total amortizing		179,243		(61,816	)		(104,376	)		13,051		5.2
Purchased IP - not yet deployed		20,137		(11,231	)		-			8,906
Total intangibles	$	199,380	$	(73,047	)	$	(104,376	)	$	21,957

	January 28 , 201 7
	Gross Value		Impairment			Accumulated Amortization and Effect of Currency Translation			Net Value		Weighted Average Remaining Amortization Period (Years)
Acquired intangible assets:
Developed technology	$	85,427	$	(24,614	)	$	(52,854	)	$	7,959		7.4
Customer relationships		54,505		(30,486	)		(20,897	)		3,122		5.8
Trademarks and other		4,078		-			(3,858	)		220		1.9
Purchased IP - amortizing		36,007		(5,516	)		(23,057	)		7,434		2.3
Total amortizing		180,017		(60,616	)		(100,666	)		18,735		5.0
Purchased IP - not yet deployed		16,449		(4,440	)		-			12,009
Total intangibles	$	196,466	$	(65,056	)	$	(100,666	)	$	30,744

Acquired intangible assets represent intangible assets acquired through business combinations. Purchased intellectual property (“IP”) represents intangible assets acquired through direct purchases of licensed technology from vendors which is incorporated into our products

. Purchased IP

not

yet deployed relates to purchased IP from

third

parties for our products that are currently in development. We begin amortizing such IP upon the earlier of the beginning of the term of the license agreement, as appropriate, or at the time we begin shipment of the associated products into which such IP is incorporated.

As part of our restructuring plan as discuss

ed in Note

we recorded an impairment charge for purchased IP of

$5.0

million and

$8.0

million for the

three

and

nine

months ended

October 28, 2017,

respectively.

The following table presents the amortization of intangible assets in the accompanying condensed consolidated statements of operations (in thousands):

	Three Months Ended				Nine Months Ended
	October 2 8 , 201 7		October 29 , 201 6		October 2 8 , 201 7		October 29 , 201 6
Cost of revenue	$	845	$	2,025	$	3,138	$	6,053
Operating expenses		444		709		1,339		2,139
Total intangibles amortization expense	$	1,289	$	2,734	$	4,477	$	8,192

As of

October 28

2017,

we expect amortization expense in future periods to be as follows (in thousands):

Fiscal year	Total
201 8 (remaining three months)	$	1,038
201 9		3,718
2020		2,432
20 21		1,588
20 22		1,243
Thereafter		3,032
Total	$	13,051