US PATENT SUBCLASS 428 / 134
.~.~ Noncircular aperture (e.g., slit, diamond, rectangular, etc.)

Current as of: June, 1999
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428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

98  DF  STRUCTURALLY DEFINED WEB OR SHEET (E.G., OVERALL DIMENSION, ETC.) {20}
131  DF  .~ Including aperture {3}
134.~.~ Noncircular aperture (e.g., slit, diamond, rectangular, etc.) {2}
135  DF  .~.~.~> Diamond or hexagonal
136  DF  .~.~.~> Slit or elongated

DEFINITION

Classification: 428/134

(under subclass 131) Product in which the wall defining a through opening is of a shape other than a continuous curved line at a constant distance from a central point.