Ryuichi Toyoda

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Pen-type computer input device
- Patent number 5,371,516
- Issue date Dec 6, 1994
- Matsushita Electric Industrial Co., Ltd.
- Ryuichi Toyoda
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Pen-type input device for computers having ball with rotational sen...
- Patent number 5,210,405
- Issue date May 11, 1993
- Matsushita Electric Industrial Co., Ltd.
- Ryuichi Toyoda
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Pen-type computer input device
- Patent number 5,159,321
- Issue date Oct 27, 1992
- Matsushita Electric Industrial Co., Ltd.
- Takeshi Masaki
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Pen-type computer input device
- Patent number 5,027,115
- Issue date Jun 25, 1991
- Matsushita Electric Industrial Co., Ltd.
- Kimikatsu Sato
- G06 - COMPUTING CALCULATING COUNTING