Issued Patents 2020
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D902180 | Remote controller for toilet seat with bidet | Ayaka Shigeta | 2020-11-17 |
| D886966 | Water closet | Kazuki Otsuka, Masafumi Ishikawa | 2020-06-09 |
| D884851 | Water closet | Kazuki Otsuka, Masafumi Ishikawa | 2020-05-19 |
| D884847 | Water closet | Kazuki Otsuka, Masafumi Ishikawa | 2020-05-19 |
| D884852 | Water closet | Kazuki Otsuka, Masafumi Ishikawa | 2020-05-19 |
| D884853 | Water closet | Kazuki Otsuka, Masafumi Ishikawa | 2020-05-19 |
| D884854 | Toilet seat | Hirotaka Nakabayashi, Tomohiro Miyazaki | 2020-05-19 |
| D882728 | Water closet | Kazuki Otsuka, Masafumi Ishikawa | 2020-04-28 |
| D882741 | Water closet | Kazuki Otsuka, Masafumi Ishikawa | 2020-04-28 |
| D882742 | Water closet | Kazuki Otsuka, Masafumi Ishikawa | 2020-04-28 |
| D882739 | Water closet | Kazuki Otsuka, Masafumi Ishikawa | 2020-04-28 |
| 10595688 | Toilet apparatus | Megumi Takeshita, Mihoko Sato, Tomofumi Onishi, Akihiro Ashihara, Ayaka Shigeta +1 more | 2020-03-24 |