- All sections
- A - Human necessities
- A63H - Toys, e.g. tops, dolls, hoops or building blocks
- A63H 29/04 - Helical-spring driving mechanisms
Patent holdings for IPC class A63H 29/04
Total number of patents in this class: 3
10-year publication summary
|
1
|
0
|
3
|
2
|
1
|
3
|
0
|
0
|
1
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mattel, Inc. | 3006 |
1 |
| Einar Osterhage | 1 |
1 |
| Sony Group Corporation | 15745 |
1 |
| Other owners | 0 |