Sadao Minakawa

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Patents Grantslast 30 patents

Information Patent Grant
Spectrophotometer
- Patent number 5,276,499
- Issue date Jan 4, 1994
- Hitachi, Ltd.
- Sadao Minakawa
- G01 - MEASURING TESTING
Information Patent Grant
Spectrophotometer with near infrared radiation sensor having an imp...
- Patent number 5,041,727
- Issue date Aug 20, 1991
- Hitachi, Ltd.
- Masaya Kojima
- G01 - MEASURING TESTING
Information Patent Grant
Spectrophotometer having functions of both a double-monochromater a...
- Patent number 4,981,357
- Issue date Jan 1, 1991
- Hitachi, Ltd.
- Sadao Minakawa
- G01 - MEASURING TESTING
Information Patent Grant
Photoelastic effect measuring device
- Patent number 4,810,089
- Issue date Mar 7, 1989
- Hitachi, Ltd.
- Takeo Murakoshi
- G01 - MEASURING TESTING
Information Patent Grant
Optical property measuring device
- Patent number 4,810,872
- Issue date Mar 7, 1989
- Hitachi, Ltd.
- Takeo Murakoshi
- G01 - MEASURING TESTING