US PATENT SUBCLASS 324 / 230
.~.~.~ Layer or layered material

Current as of: June, 1999
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324 /   HD   ELECTRICITY: MEASURING AND TESTING

200  DF  MAGNETIC {24}
228  DF  .~ With means to create magnetic field to test material {5}
229  DF  .~.~ Thickness measuring {2}
230.~.~.~ Layer or layered material

DEFINITION

Classification: 324/230

Layer of layered material:

(under subclass 229) Subject matter wherein the material tested is composed of dissimilar layered material and the thickness of one layer is found by placing the layered material in the magnetic field and the apparatus to sense and indicate the sensing of the magnetic field is responsive to the magnetic field modified by the layer to thus sense and indicate the depth of the layer.