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Intangible Assets | 3 Months Ended
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Mar. 28, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets | 9. Intangible Assets Intangible assets, net, consist of the following (in thousands):
| March 28, 2020 |  | December 28, 2019
Patents | $ | 26,332 |  |  | $ | 23,242 |
Customer relationships | 23,219 |  |  | 7,669 |
Licenses-related party | 7,500 |  |  | 7,500 |
Trademarks | 6,591 |  |  | 4,614 |
Acquired technology | 5,580 |  |  | 5,580 |
Capitalized software development costs | 3,328 |  |  | 3,328 |
Other | 5,466 |  |  | 5,466 |
Total intangible assets | 78,016 |  |  | 57,399 |
Accumulated amortization | (31,277 | ) |  | (30,148 | )
Intangible assets, net | $ | 46,739 |  |  | $ | 27,251 |
Intangible assets have a twelve year weighted-average amortization period. Total amortization expense for the three months ended March 28, 2020 and March 30, 2019 was $1.4 million and $1.1 million, respectively. Total renewal costs for patents and trademarks for the three months ended March 28, 2020 and March 30, 2019 were $0.2 million and $0.3 million, respectively. As of March 28, 2020, the weighted-average number of years until the next renewal was one year for patents and five years for trademarks. During the three months ended March 28, 2020, the Company completed a business combination. Based on the Company’s preliminary purchase price allocation, approximately $15.5 million, $2.6 million and $1.7 million of the purchase price has been assigned to customer relationships, acquired technology and trademarks, respectively. The Company is still gathering additional information to finalize these preliminary estimates and expects to finalize the purchase price allocation as soon as practicable, but no later than one year from the acquisition date. Estimated amortization expense for each of the next fiscal years is as follows (in thousands):
Fiscal year | Amount
2020 (balance of year) | $ | 5,716 |
2021 | 5,940 |
2022 | 4,866 |
2023 | 4,043 |
2024 | 3,653 |
Thereafter | 22,521 |
Total | $ | 46,739 |

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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