Issued Patents All Time
Showing 26–44 of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5862079 | Method and device for erasing non-volatile semiconductor memory with smaller erase variation | — | 1999-01-19 |
| 5821805 | Charge pump circuit having different threshold biases of the transistors | — | 1998-10-13 |
| 5808940 | Nonvolatile semiconductor memory | Noriyuki Ohta, Noriaki Kodama | 1998-09-15 |
| 5675535 | Sense amplifier having a high operation speed and a low power consumption | — | 1997-10-07 |
| 5526309 | Flash memory device having high speed erase mode and method for performing the erase mode | — | 1996-06-11 |
| 5448518 | Virtual ground type nonvolatile semiconductor memory device capable of simultaneously accessing two memory cells | — | 1995-09-05 |
| 5313086 | Semiconductor device | — | 1994-05-17 |
| 5305273 | Semiconductor memory device | — | 1994-04-19 |
| 5301149 | Data read-out circuit for semiconductor memory device | — | 1994-04-05 |
| 5295106 | Row decoding circuit | — | 1994-03-15 |
| 5276371 | Output buffer having high resistance against electrostatic breakdown | — | 1994-01-04 |
| 5267207 | Electrically programmable read only memory device with reliable sense amplifier circuit | — | 1993-11-30 |
| 5239211 | Output buffer circuit | — | 1993-08-24 |
| 4982113 | Signal distributing unit for various input signals different in voltage level | — | 1991-01-01 |
| 4962482 | Nonvolatile memory device using a sense circuit including variable threshold transistors | — | 1990-10-09 |
| 4947056 | MOSFET for producing a constant voltage | — | 1990-08-07 |
| 4947378 | Memory element exchange control circuit capable of automatically refreshing a defective address | Hiroyuki Kobatake | 1990-08-07 |
| 4876462 | Control circuit for multipurpose input terminal | Hiroyuki Kobatake | 1989-10-24 |
| 4868788 | Semiconductor memory device with improved word line drive circuit | — | 1989-09-19 |