John Ma

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Burnsville, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Binary optical grating and method for generating a moire pattern fo...
- Patent number 6,509,559
- Issue date Jan 21, 2003
- PPT Vision, Inc.
- Franz W. Ulrich
- G01 - MEASURING TESTING
Information Patent Grant
3D scanner and method for measuring heights and angles of manufactu...
- Patent number 6,501,554
- Issue date Dec 31, 2002
- PPT Vision, Inc.
- Joshua J. Hackney
- G01 - MEASURING TESTING