Yumiko Iyama

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Semiconductor memory device with high voltage generation circuit
- Patent number 5,986,935
- Issue date Nov 16, 1999
- Kabushiki Kaisha Toshiba
- Yumiko Iyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Nonvolatile semiconductor memory device having reference potential...
- Patent number 4,974,206
- Issue date Nov 27, 1990
- Kabushiki Kaisha Toshiba
- Yumiko Iyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Reference setting circuit for determining written-in content in non...
- Patent number 4,951,257
- Issue date Aug 21, 1990
- Kabushiki Kaisha Toshiba
- Keniti Imamiya
- G11 - INFORMATION STORAGE