Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11377056 | In-vehicle system | — | 2022-07-05 |
| 10291429 | Control device and control method | Taichi Tashiro, Keiji Yamamoto, Kohta NAKAMURA | 2019-05-14 |
| 8401540 | Mobile communication system, control device thereof, mobile terminal, and database constructing method | Keiji Yamamoto | 2013-03-19 |
| 8401557 | Mobile communication system, its control device, and hand-off control method | Keiji Yamamoto | 2013-03-19 |
| 8385298 | Wireless communication system, control center, and base station | Keiji Yamamoto | 2013-02-26 |
| 8218504 | Mobile communication system, its control device, handover control method, and mobile terminal | Keiji Yamamoto | 2012-07-10 |
| 8126463 | Mobile communication system, base station control apparatus, mobile terminal and method for controlling handover | Keiji Yamamoto, Masakazu Shirakawa | 2012-02-28 |