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Intangible Assets and Goodwill
3 Months Ended
Apr. 02, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets and Goodwill INTANGIBLE ASSETS AND GOODWILL
Intangible assets that have finite useful lives are amortized over their estimated useful lives. The latest annual impairment assessment of goodwill and indefinite lived intangible assets was completed in the fiscal fourth quarter of 2022. Future impairment tests for goodwill and indefinite lived intangible assets will be performed annually in the fiscal fourth quarter, or sooner, if warranted.
(Dollars in Millions)April 2, 2023January 1, 2023
Intangible assets with definite lives:  
Patents and trademarks — gross$44,636 44,012 
Less accumulated amortization(23,512)(22,266)
Patents and trademarks — net21,124 21,746 
Customer relationships and other intangibles — gross23,008 22,987 
Less accumulated amortization(13,211)(12,901)
Customer relationships and other intangibles — net(1)
9,797 10,086 
Intangible assets with indefinite lives:  
Trademarks6,843 6,807 
Purchased in-process research and development9,684 9,686 
Total intangible assets with indefinite lives16,527 16,493 
Total intangible assets — net$47,448 48,325 
(1)The majority is comprised of customer relationships


Goodwill as of April 2, 2023 was allocated by segment of business as follows:
(Dollars in Millions)Consumer HealthPharmaceuticalMedTechTotal
Goodwill at January 1, 2023
$9,184 10,184 25,863 45,231 
Goodwill, related to acquisitions— — — — 
Currency translation/Other49 124 171 *344 
Goodwill at April 2, 2023
$9,233 10,308 26,034 45,575 
*Includes purchase price allocation adjustment for Abiomed

The weighted average amortization period for patents and trademarks is 12 years. The weighted average amortization period for customer relationships and other intangible assets is 21 years. The amortization expense of amortizable intangible assets included in cost of products sold was $1.2 billion and $1.1 billion for the fiscal first quarters ended April 2, 2023 and April 3, 2022, respectively. Intangible asset write-downs are included in Other (income) expense, net.

The estimated amortization expense for approved products, before tax, for the five succeeding years is approximately:
(Dollars in Millions)
20232024202520262027
$4,8004,6003,8003,2002,600

See Note 10 to the Consolidated Financial Statements for additional details related to acquisitions and divestitures.