Issued Patents 2020
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D892943 | Accessory for spinning top toy | Hiroyuki Matsukawa, Hiroyuki Hama, Toshinobu Ishii | 2020-08-11 |
| 10733735 | Ophthalmic apparatus | Keiichiro Okamoto, Fushi Li | 2020-08-04 |
| D889564 | Spinning top toy | Hiroyuki Matsukawa | 2020-07-07 |
| D886910 | Spinning top toy | Hiroyuki Matsukawa | 2020-06-09 |
| D886911 | Spinning top toy | Hiroyuki Matsukawa | 2020-06-09 |
| 10639558 | Spinning top launching device | — | 2020-05-05 |
| D875844 | Spinning top toy | Hiroyuki Matsukawa | 2020-02-18 |
| 10556187 | Toy top | Takeaki Maeda | 2020-02-11 |
| D873351 | Accessory for spinning top toy | Hiroyuki Matsukawa | 2020-01-21 |