Shepard D. Johnson

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Arlington, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Lens focus shift sensor
- Patent number 5,991,004
- Issue date Nov 23, 1999
- MRS Technology, Inc.
- John D. Wallace
- G02 - OPTICS
Information Patent Grant
Alignment system for use in lithography utilizing a spherical refle...
- Patent number 5,483,345
- Issue date Jan 9, 1996
- MRS Technology, Inc.
- J. Casey Donaher
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY