Issued Patents All Time
Showing 51–75 of 90 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6240021 | Nonvolatile semiconductor memory device improved in readout operation | — | 2001-05-29 |
| 6222773 | Nonvolatile semiconductor memory in which the number of programming or erasing bits increases with the progress of programming or erasing | Tooru Tanzawa, Nobuaki Otsuka, Hironori Banba, Shigeru Atsumi, Masao Kuriyama +1 more | 2001-04-24 |
| 6187632 | Anneal technique for reducing amount of electronic trap in gate oxide film of transistor | Susumu Shuto, Miwa Tanaka, Masahisa Sonoda, Toshiaki Idaka, Kenichi Sasaki | 2001-02-13 |
| 6118697 | Nonvolatile semiconductor memory in which the number of programming or erasing bits increases with the progress of programming or erasing | Tooru Tanzawa, Nobuaki Otsuka, Hironori Banba, Shigeru Atsumi, Masao Kuriyama +1 more | 2000-09-12 |
| 6078074 | Semiconductor device having multilayer metal interconnection | Masataka Takebuchi, Yoshiharu Hirata | 2000-06-20 |
| 5981381 | Method of manufacturing a semiconductor memory device | Masao Tanimoto | 1999-11-09 |
| 5882994 | Nonvolatile semiconductor memory, and method of manufacturing the same | Yoshiko Araki | 1999-03-16 |
| 5838615 | Nonvolatile semiconductor memory device having reduced source line resistance | Eiji Kamiya | 1998-11-17 |
| 5736442 | Method of manufacturing a semiconductor memory device | — | 1998-04-07 |
| 5694357 | Nonvolatile semiconductor memory device for storing multi-value data | — | 1997-12-02 |
| 5679590 | Method for manufacturing contact hole for a nonvolatile semiconductor device | Masaki Sato, Kuniyoshi Yoshikawa | 1997-10-21 |
| 5666311 | Method of making semiconductor device having isolating trenches | — | 1997-09-09 |
| 5657271 | Nonvolatile semiconductor memory device in which band to band tunneling current is suppressed | — | 1997-08-12 |
| 5652449 | Semiconductor device with an insulating film separating conductive layers and method of maufacturing semiconductor device | Takeshi Shinagawa | 1997-07-29 |
| 5646888 | Semiconductor device having isolating regions | — | 1997-07-08 |
| 5453634 | Non-volatile semiconductor device | — | 1995-09-26 |
| 5428572 | Program element for use in redundancy technique for semiconductor memory device | — | 1995-06-27 |
| 5400344 | Semiconductor device with function of testing insulation defect between bit lines and testing method therefor | — | 1995-03-21 |
| 5372963 | Method for manufacturing a semiconductor memory device capable of preventing memory cells from deteriorating in electric characteristics | — | 1994-12-13 |
| 5304829 | Nonvolatile semiconductor device | Kuniyoshi Yoshikawa | 1994-04-19 |
| 5274477 | Electrophotographic facsimile apparatus having a pivoted upper structure | Kazuhiro Ichinokawa, Masatoshi Takano, Masakazu Hirano, Satoshi Hokamura | 1993-12-28 |
| 5270104 | Unsaturated polyester resin composition and laminates | Kazuhide Fujimoto, Satoshi Tonoki | 1993-12-14 |
| 5208174 | Method for manufacturing a nonvolatile semiconductor memory device | — | 1993-05-04 |
| 5150178 | Gate structure for a semiconductor memory device | — | 1992-09-22 |
| 5081504 | Drum cleaning unit for image recording apparatus | Satoru Morisawa, Masato Matsubara | 1992-01-14 |