Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7850086 | Semiconductor integrated circuit and noncontact information system including it | Tatsumi Sumi | 2010-12-14 |
| 7711917 | Semiconductor device and IC card | Kazuki Yoshioka, Yoshitaka Mano | 2010-05-04 |
| 7138699 | Semiconductor integrated circuit and noncontact information medium | Tatsumi Sumi | 2006-11-21 |
| 7023261 | Current switching for maintaining a constant internal voltage | Yoshitaka Mano | 2006-04-04 |
| 6848620 | Semiconductor integrated circuit | Tatsumi Sumi | 2005-02-01 |
| 6838891 | Semiconductor device | Mitsuyoshi Ohya | 2005-01-04 |
| 6067265 | Reference potential generator and a semiconductor memory device having the same | Toshio Mukunoki, Hiroshige Hirano, Tetsuji Nakakuma, Tatsumi Sumi, Nobuyuki Moriwaki | 2000-05-23 |
| 5953277 | Reference potential generator and a semiconductor memory device having the same | Toshio Mukunoki, Hiroshige Hirano, Tetsuji Nakakuma, Tatsumi Sumi, Nobuyuki Moriwaki | 1999-09-14 |
| 5828615 | Reference potential generator and a semiconductor memory device having the same | Toshio Mukunoki, Hiroshige Hirano, Tetsuji Nakakuma, Tatsumi Sumi, Nobuyuki Moriwaki | 1998-10-27 |
| 5751628 | Ferroelectric memory devices and method for testing them | Hiroshige Hirano, Nobuyuki Moriwaki, Tetsuji Nakakuma, Toshiyuki Honda | 1998-05-12 |
| 5546342 | Semiconductor memory device including reverse and rewrite means | Toshio Mukunoki, Nobuyuki Moriwaki, Tatsumi Sumi, Hiroshige Hirano, Tetsuji Nakakuma | 1996-08-13 |
| 5523974 | Semiconductor memory device with redundant memory cell backup | Hiroshige Hirano, Tetsuji Nakakuma, Nobuyuki Moriwaki, Toshio Mukunoki, Tatsumi Sumi | 1996-06-04 |
| 5515312 | Semiconductor memory device | Tetsuji Nakakuma, Tatsumi Sumi, Hiroshige Hirano, Nobuyuki Moriwaki, Toshio Mukunoki | 1996-05-07 |
| 5467302 | Semiconductor memory device | Hiroshige Hirano, Tatsumi Sumi, Nobuyuki Moriwaki | 1995-11-14 |
| 5392234 | Semiconductor memory device | Hiroshige Hirano, Tatsumi Sumi, Nobuyuki Moriwaki | 1995-02-21 |