| Subclass | Subgroup | Patent |
| E01C | 11/245 | 10968572 |
| 13/045 | 10968573 | |
| 19/38 | 10968574 | |
| 23/088 | 10968575 | |
| 10968576 | ||
| 10968577 | ||
| E01D | 19/106 | 10968578 |
| E01F | 7/04 | 10968579 |
| 7/045 | 10968580 | |
| 9/30 | 10968581 | |
| 9/524 | 10968582 | |
| 9/553 | 10968583 | |
| 13/046 | 10968584 | |
| E01H | 1/0827 | 10968585 |
| 1/1206 | 10968586 |