Issued Patents All Time
Showing 1–25 of 57 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12367787 | Communication system and terminal apparatus | — | 2025-07-22 |
| 12169602 | Communication system and terminal apparatus | Masamitsu Ito, Katsuhito Obi | 2024-12-17 |
| 12111989 | Method for adjusting resonance frequency of resonance circuit included in electronic pen, electronic pen, and method for manufacturing electronic pen | Shigeru Yamashita, Masamitsu Ito | 2024-10-08 |
| 11993737 | Surface protection film | Yutaka Kamada, Arata Tani, Soh KATO | 2024-05-28 |
| 11937045 | Audio image control method, headphones, and headphone attachment | — | 2024-03-19 |
| 11853489 | Electronic pen of capacitive system, electronic pen cartridge of capacitive system, charging tray for electronic pen, and charging tray for electronic pen cartridge | — | 2023-12-26 |
| D1001130 | Cartridge for an electronic pen | Ryoji Kamiyama, Masamitsu Ito | 2023-10-10 |
| 11762487 | Method for adjusting resonance frequency of resonance circuit included in electronic pen, electronic pen, and method for manufacturing electronic pen | Shigeru Yamashita, Masamitsu Ito | 2023-09-19 |
| 11714498 | Electronic pen core body and electronic pen | Ryoji Kamiyama, Masamitsu Ito, Daisuke Watanabe | 2023-08-01 |
| 11669176 | Integrated circuit and electronic pen | Shigeru Yamashita, Masamitsu Ito | 2023-06-06 |
| 11662834 | Electronic erasing device and writing information processing system | Ryoji Kamiyama, Masamitsu Ito, Shigeru Yamashita, Fujii Kosuke | 2023-05-30 |
| 11600195 | Digital input device, digital correction device and distance learning system | — | 2023-03-07 |
| D978966 | Cartridge for an electronic pen | Ryoji Kamiyama, Masamitsu Ito | 2023-02-21 |
| D978243 | Cartridge for an electronic pen | Ryoji Kamiyama, Masamitsu Ito | 2023-02-14 |
| 11573649 | Electronic pen core body and electronic pen | Ryoji Kamiyama, Masamitsu Ito, Daisuke Watanabe | 2023-02-07 |
| 11550405 | Learning support system | Tatsunosuke Tobita | 2023-01-10 |
| D968408 | Cartridge for an electronic pen | Ryoji Kamiyama, Masamitsu Ito | 2022-11-01 |
| D966268 | Cartridge for an electronic pen | Ryoji Kamiyama, Masamitsu Ito | 2022-10-11 |
| 11385725 | Electronic erasing device and writing information processing system | Ryoji Kamiyama, Masamitsu Ito, Shigeru Yamashita, Fujii Kosuke | 2022-07-12 |
| 11327584 | Integrated circuit and electronic pen | Shigeru Yamashita, Masamitsu Ito | 2022-05-10 |
| D947192 | Cartridge for an electronic pen | Ryoji Kamiyama, Masamitsu Ito | 2022-03-29 |
| D946576 | Cartridge for an electronic pen | Ryoji Kamiyama, Masamitsu Ito | 2022-03-22 |
| 11175748 | Learning support system | Tatsunosuke Tobita | 2021-11-16 |
| 11150750 | Electronic pen and electronic pen main body unit | Kohei Tanaka, Kenichi Ninomiya, Takenori Kaneda | 2021-10-19 |
| 11141963 | Surface protective film | Yutaka Kamada, Arata Tani, Soh KATO | 2021-10-12 |