Other intangible assets as of and consisted primarily of the fair value of identifiable assets acquired in business combinations other than tangible assets and goodwill. The gross amount and accumulated amortization of the Company's other intangible assets as of and the amortization expense for the and -month periods ended and and the classification of such amortization expense within the accompanying unaudited condensed consolidated statements of income are as follows (in thousands):

 

																		Amortization Expense
		Gross Amount								Accumulated Amortization								Three-Month Periods Ended								Nine-Month Periods Ended
		December 27,				March 29,				December 27,				March 29,				December 27,				December 29,				December 27,				December 29,
		2020				2020				2020				2020				2020				2019				2020				2019
Tradename and trademarks		$	3,667			$	3,667			$	1,930			$	1,747			$	61			$	62			$	183			$	184
Developed technology			1,100				1,100				376				293				28				28				83				83
Non-compete covenants			458				458				337				278				19				19				59				58
Patents			1,601				1,601				937				889				13				27				48				81
Customer relationships			7,374				7,374				5,639				5,416				72				78				223				235
Total other intangible assets		$	14,200			$	14,200			$	9,219			$	8,623			$	193			$	214			$	596			$	641
Classification within the accompanying unaudited condensed consolidated statements of income:
Cost of products sold																		$	2			$	2			$	5			$	5
Marketing and administrative expenses																			191				212				591				636
Total amortization expense																		$	193			$	214			$	596			$	641