According to the statistics of signpost.com, there are 40 registered trademarks of tennis rackets.
How to choose other minor categories when registering:
1. Registered trademark 1 piece (racket handle, group number: 2807), accounting for 2.5% of the registered trademark.
2. Registered trademark 1 piece (sports equipment, group number: 2805), accounting for 2.5% of the registered trademark.
3. Registered trademark 1 piece (sports muscle equipment, group number: 2805), accounting for 2.5% of the registered trademark.
4. Registered trademark 1 piece (chest expander (for muscle exercise), group number: 2805), accounting for 2.5% of the registered trademark.
5. Registered trademark 1 piece (fitness stool, group number: 2805), accounting for 2.5% of the registered trademark.
6. Selective registered trademark 1 piece (body repair device, group number: 2805), accounting for 2.5% of the registered trademark.
7. Registered trademark 1 piece (fitness equipment, group number: 2805), accounting for 2.5% of the registered trademark.
8. Registered trademark 1 piece (American squash racket, group number: 2807), accounting for 2.5% of the registered trademark.
9. Registered trademark 1 piece (ball auction, group number: 2809), accounting for 2.5% of the registered trademark.
10. Registered trademark 1 piece (ice hockey, group number: 2804), accounting for 2.5% of the registered trademark.