Note 5—Intangible Assets

The following is a summary of our intangible assets as of September 29, 2018 (in thousands):


	Gross				Net
	Carrying		Accumulated		Carrying		Useful
	Amount		Amortization		Amount		Life
Tradename	$	31,363	$	—	$	31,363	Indefinite
Customer relationships		42,205		(24,151)		18,054	11 years
Trademarks		13,663		(2,360)		11,303	6 - 30 years
Trade dress		14,832		—		14,832	Indefinite
Patents		5,090		(404)		4,686	4 - 25 years
Non-compete agreements		2,815		(2,815)		—	5 years
Other intangibles		1,021		(146)		875	15 years
Total intangible assets	$	110,989	$	(29,876)	$	81,113

The following is a summary of our intangible assets as of December 30, 2017 (in thousands):


	Gross				Net
	Carrying		Accumulated		Carrying		Useful
	Amount		Amortization		Amount		Life
Tradename	$	31,363	$	—	$	31,363	Indefinite
Customer relationships		42,205		(21,273)		20,932	11 years
Trademarks		10,627		(1,494)		9,133	6 - 30 years
Trade dress		8,336		—		8,336	Indefinite
Patents		3,868		(256)		3,612	4 - 25 years
Non-compete agreements		2,815		(2,815)		—	5 years
Other intangibles		1,024		(98)		926	15 years
Total intangible assets	$	100,238	$	(25,936)	$	74,302

For the three months ended September 29, 2018 and September 30, 2017, amortization expense totaled $1.4 million and $1.2 million, respectively. Amortization expense totaled $3.9 million and $4.1 million for the nine months ended September 29, 2018 and 2017, respectively.

In February 2017, a binding settlement was reached in the United States District Court related to lawsuits brought by the Company against RTIC Coolers. Under the terms of the agreement, RTIC Coolers was required to make a financial payment to the Company; to cease sales of all products subject to the lawsuit—this includes hard‑sided coolers, soft‑sided coolers, and Drinkware; and to redesign all products in question. In accordance with our policy on intangible assets, amounts received under the settlement agreement were credited against the carrying value of the related intangible asset.