| Number | Date | Country | Kind |
|---|---|---|---|
| 111204688 | May 2022 | TW | national |
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| 5482480 | Miyazaki | Jan 1996 | A |
| 20020022411 | LaCoy | Feb 2002 | A1 |
| 20080006255 | Sikora | Jan 2008 | A1 |
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| 20120003883 | Pavlovic | Jan 2012 | A1 |
| 20140115891 | Hsu | May 2014 | A1 |
| 20190237888 | Nakazono | Aug 2019 | A1 |
| Entry |
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| Kaman canted coil springs, posted Sep. 6, 2019 [online], [retrieved Mar. 25, 2025]. Retrieved from internet, https://www.balseal.com/spring/ (Year: 2019). |
| Kaman mechanical connecting springs, posted Sep. 6, 2019 [online], [retrieved Mar. 25, 2025]. Retrieved from internet, https://www.balseal.com/spring/mechanical/ (Year: 2019). |