Allen J. Siefken

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Lake Oswego, OR, US

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Patents Grantslast 30 patents

Information Patent Grant
Noninvasive ultrasonic proximity detector for a fluid actuated cyli...
- Patent number 5,463,596
- Issue date Oct 31, 1995
- The Rexroth Corporation
- Allen J. Siefken
- G01 - MEASURING TESTING
Information Patent Grant
Noninvasive ultrasonic proximity detector for a fluid actuated cyli...
- Patent number 5,459,698
- Issue date Oct 17, 1995
- The Rexroth Corporation
- Allen J. Siefken
- G01 - MEASURING TESTING