US PATENT SUBCLASS 119 / 503
.~.~ Hog farrowing pen

Current as of: June, 1999
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119 /   HD   ANIMAL HUSBANDRY

416  DF  CONFINING OR HOUSING {11}
502  DF  .~ Pen or rack {6}
503.~.~ Hog farrowing pen {6}
504  DF  .~.~.~> Collapsible
505  DF  .~.~.~> With automatic farrowing device
506  DF  .~.~.~> Adjustable enclosure element for piglet escape passage
507  DF  .~.~.~> Sow size adjustable pen
508  DF  .~.~.~> Having heating means
509  DF  .~.~.~> Pen floor

DEFINITION

Classification: 119/503

Hog farrowing pen:

(under subclass 502) Subject matter including structure and apparatus particularly suitable for the birthing, nursing, and caring for piglets by the sow mother.