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Goodwill and other intangible assets | 9 Months Ended
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Jul. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and other intangible assets | Goodwill and other intangible assets Changes in the carrying amount of goodwill for th e nine months ended July 31, 2023 by operating segment were as follows:
|  | Industrial Precision Solutions |  | Medical Fluid Systems |  | Advanced Technology Solutions |  | Total
Balance at October 31, 2022 |  | $ | 520,236 |  |  | $ | 1,172,069 |  |  | $ | 112,388 |  |  | $ | 1,804,693 |
Acquisitions |  | — |  |  | — |  |  | 279,630 |  |  | 279,630 |
Currency effect |  | 4,744 |  |  | 3,869 |  |  | 17,844 |  |  | 26,457 |
Balance at July 31, 2023 |  | $ | 524,980 |  |  | $ | 1,175,938 |  |  | $ | 409,862 |  |  | $ | 2,110,780 |
The increase in goodwill for the nine months ended July 31, 2023 was due to the acquisition of CyberOptics. See Acquisitions Note for additional details. Information regarding our intangible assets subject to amortization was as follows:
|  | July 31, 2023
|  | Carrying Amount |  | Accumulated Amortization |  | Net Book Value
Customer relationships |  | $ | 517,147 |  |  | $ | 282,598 |  |  | $ | 234,549 |
Patent/technology costs |  | 176,396 |  |  | 109,783 |  |  | 66,613 |
Trade name |  | 99,413 |  |  | 50,673 |  |  | 48,740 |
Non-compete agreements |  | 10,559 |  |  | 9,937 |  |  | 622 |
Other |  | 143 |  |  | 143 |  |  | — |
Total |  | $ | 803,658 |  |  | $ | 453,134 |  |  | $ | 350,524 |
|  | October 31, 2022
|  | Carrying Amount |  | Accumulated Amortization |  | Net Book Value
Customer relationships |  | $ | 480,058 |  |  | $ | 250,798 |  |  | $ | 229,260 |
Patent/technology costs |  | 157,549 |  |  | 96,426 |  |  | 61,123 |
Trade name |  | 82,759 |  |  | 44,707 |  |  | 38,052 |
Non-compete agreements |  | 10,253 |  |  | 9,290 |  |  | 963 |
Other |  | 446 |  |  | 442 |  |  | 4 |
Total |  | $ | 731,065 |  |  | $ | 401,663 |  |  | $ | 329,402 |
Amortization expense for the three months ended July 31, 2023 and 2022 was $13,922 and $12,709, respectively. Amortization expense for the nine months ended July 31, 2023 and 2022 was $41,839 and $38,366, respectively. See Acquisitions Note for details regarding intangibles recorded due to the acquisition of CyberOptics.

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