US PATENT SUBCLASS 33 / 294
.~.~ Self computing type rod

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

Internet Version by PATENTEC © 1999      Terms of Use


33 /   HD   GEOMETRICAL INSTRUMENTS

227  DF  STRAIGHT-LINE LIGHT RAY TYPE {20}
293  DF  .~ Rod or target {3}
294.~.~ Self computing type rod

DEFINITION

Classification: 33/294

(under subclass 293) Device wherein the rod includes means permitting the difference in elevation between the two points to be read directly from the rod without computation.