Donald E. Stephens

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Palo Alto, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Sample presence detector for automatic sample injector
- Patent number 4,926,702
- Issue date May 22, 1990
- Beckman Instruments, Inc.
- Donald E. Stephens
- G01 - MEASURING TESTING
Information Patent Grant
Analytical instrument thermoelectric temperature regulator
- Patent number 4,534,941
- Issue date Aug 13, 1985
- Beckman Instruments, Inc.
- Donald E. Stephens
- G05 - CONTROLLING REGULATING
Information Patent Grant
Method and apparatus for regulating the temperature of an analytica...
- Patent number 4,518,700
- Issue date May 21, 1985
- Beckman Instruments, Inc.
- Donald E. Stephens
- G05 - CONTROLLING REGULATING
Information Patent Grant
Packed column thermal reactor for an analytical instrument
- Patent number 4,438,070
- Issue date Mar 20, 1984
- Beckman Instruments, Inc.
- Donald E. Stephens
- G01 - MEASURING TESTING
Information Patent Grant
Flow monitoring method and apparatus
- Patent number 4,372,150
- Issue date Feb 8, 1983
- Beckman Instruments, Inc.
- Donald E. Stephens
- G05 - CONTROLLING REGULATING
Information Patent Grant
Temperature regulating apparatus
- Patent number 4,294,799
- Issue date Oct 13, 1981
- Beckman Instruments, Inc.
- Donald E. Stephens
- G01 - MEASURING TESTING
Information Patent Grant
Colorimetric fluid analyzer
- Patent number 3,941,487
- Issue date Mar 2, 1976
- Beckman Instruments, Inc.
- Robert J. Ehret
- G01 - MEASURING TESTING