Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7949881 | Mobil terminal device, personal identification number verification program, and method of verifying personal identification number | — | 2011-05-24 |
| 7286852 | Subscriber identity module and method of preventing access thereto, and mobile communication terminal device | — | 2007-10-23 |
| 6771955 | Function limiting method for telephone communication terminal, telephone communication method, telephone communication terminal and repeating center equipment | Masaru Sanpei | 2004-08-03 |
| 6513719 | Card-shaped semiconductor storage device and operation setting method of the same | — | 2003-02-04 |
| 5732349 | System and method for controlling a portable telephone according to discriminated area code | Masaru Sanpei | 1998-03-24 |
| 5463210 | IC card reader | — | 1995-10-31 |
| 5031181 | Error correction processing apparatus | Yoichiro Sako, Takeshi Fukami | 1991-07-09 |