US PATENT SUBCLASS 356 / 250
.~.~ Pendular suspension of optical element or reticle

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


356 /   HD   OPTICS: MEASURING AND TESTING

247  DF  FIDUCIAL INSTRUMENTS {3}
248  DF  .~ Artificial reference {2}
250.~.~ Pendular suspension of optical element or reticle

DEFINITION

Classification: 356/250

(under subclass 248) Subject matter where the artificial reference is determined by a pendulously suspended optical element or a reticle.