HK

Hiromi Kawashima

Fujitsu Limited: 23 patents #1,155 of 24,456Top 5%
FL Fujitsu Vlsi Limited: 1 patents #91 of 256Top 40%
Overall (All Time): #186,655 of 4,157,543Top 5%
23
Patents All Time

Issued Patents All Time

Showing 1–23 of 23 patents

Patent #TitleCo-InventorsDate
6611464 Nonvolatile semiconductor memory device having electrically and collectively erasable characteristics Takao Akaogi, Nobuaki Takashina, Yasushi Kasa, Kiyoshi Itano, Minoru Yamashita +1 more 2003-08-26
6563738 Nonvolatile semiconductor memory device having electrically and collectively erasable characteristics Takao Akaogi, Nobuaki Takashina, Yasushi Kasa, Kiyoshi Itano, Minoru Yamashita 2003-05-13
6288945 Nonvolatile semiconductor memory device having electrically and collectively erasable characteristics Shouichi Kawamura 2001-09-11
5815440 Semiconductor memory device with electrically controllable threshold voltage Takao Akaogi, Nobuaki Takashina, Yasushi Kasa, Kiyoshi Itano, Minoru Yamashita +1 more 1998-09-29
5770963 Flash memory with improved erasability and its circuitry Takao Akaogi, Tetsuji Takeguchi, Ryoji Hagiwara, Yasushi Kasa, Kiyoshi Itano +2 more 1998-06-23
5666314 Semiconductor memory device for selecting and deselecting blocks of word lines Takao Akaogi, Nobuaki Takashina, Yasushi Kasa, Kiyoshi Itano, Minoru Yamashita 1997-09-09
5631597 Negative voltage circuit for a flash memory Takao Akaogi, Tetsuji Takeguchi, Ryoji Hagiwara, Yasushi Kasa, Kiyoshi Itano +2 more 1997-05-20
5608670 Flash memory with improved erasability and its circuitry Takao Akaogi, Tetsuji Takeguchi, Ryoji Hagiwara, Yasushi Kasa, Kiyoshi Itano +2 more 1997-03-04
5592419 Flash memory with improved erasability and its circuitry Takao Akaogi, Tetsuji Takeguchi, Ryoji Hagiwara, Yasushi Kasa, Kiyoshi Itano +2 more 1997-01-07
5576637 XOR CMOS logic gate Takao Akaogi, Tetsuji Takeguchi, Ryoji Hagiwara, Yasushi Kasa, Kiyoshi Itano +2 more 1996-11-19
5452251 Semiconductor memory device for selecting and deselecting blocks of word lines Takao Akaogi, Nobuaki Takashina, Yasushi Kasa, Kiyoshi Itano, Minoru Yamashita 1995-09-19
5428580 Nonvolatile semiconductor memory having an address-transition-detection circuit Takao Akaogi 1995-06-27
5249156 Semiconductor memory device having non-volatile and volatile memory cells Ryoji Hagiwara 1993-09-28
5173876 Electrically erasable and programmable non-volatile semiconductor memory device Yoshinori Tsujimura 1992-12-22
5111136 Semiconductor circuit — 1992-05-05
4937830 Semiconductor memory device having function of checking and correcting error of read-out data Ryoji Hagiwara 1990-06-26
4817055 Semiconductor memory circuit including bias voltage generator Hideki Arakawa 1989-03-28
4812680 High voltage detecting circuit Atsushi Takeuchi 1989-03-14
4773046 Semiconductor device having fuse circuit and detecting circuit for detecting states of fuses in the fuse circuit Takao Akaogi 1988-09-20
4744058 Semiconductor programmable memory device and method of writing a predetermined pattern to same Hideki Arakawa 1988-05-10
4644182 Delay circuit having delay time period determined by discharging operation Hideki Arakawa 1987-02-17
4601020 Semiconductor memory device Hideki Arakawa 1986-07-15
4584494 Semiconductor timer Hideki Arakawa 1986-04-22