Fumio Watanabe

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Fukushima, JP

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Patents Grantslast 30 patents

Information Patent Grant
AC-modulation quadrupole mass spectrometer
- Patent number 4,695,724
- Issue date Sep 22, 1987
- Seiko Instruments & Electronics Ltd.
- Fumio Watanabe
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Electron-impact type of ion source with double grid anode
- Patent number 4,620,102
- Issue date Oct 28, 1986
- Seiko Instruments & Electronics Ltd.
- Fumio Watanabe
- H01 - BASIC ELECTRIC ELEMENTS