Duane Marshall

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Lexington, MA, US

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Patents Grantslast 30 patents

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Slug rejector
- Patent number 4,471,864
- Issue date Sep 18, 1984
- Duane Marshall
- G07 - CHECKING-DEVICES
Information Patent Grant
Apparatus for underwater image-recording as by sonar-triggered elap...
- Patent number 4,335,944
- Issue date Jun 22, 1982
- Duane Marshall
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Process of and apparatus for exploring objects detected by differen...
- Patent number 4,105,990
- Issue date Aug 8, 1978
- The Academy of Applied Science Inc.
- Robert H. Rines
- G01 - MEASURING TESTING