Appeal No. 2004-0890
Application No. 09/754,291 Page 9
references, we agree with the examiner that replacement of such a
scraper bar in Carlson with a scraper heating element that has
been modified to include heating means, such as an electric
heating device, would have been suggested by the combined
teachings of the applied references to aid in snow/ice removal.
Similarly, the addition of such a removable scraper/heating
element to the bottom edge of the snow plow blade of Mason would
have been suggested to one of ordinary skill in the art with a
reasonable expectation of success based on the combined teachings
of the applied references, especially given the disclosure in Kim
concerning the prior application of heated blade scrapers in
sidewalk and highway ice clearing. Certainly, it is within the
ambit of one of ordinary skill in the art to employ an ice
scraper/heating element structure that is amendable for securing
to a snow plow based on the combined teachings of the applied
references. Thus, appellant’s contention that the sharp leading
edge of the ice scrapers designed for window ice scraping of the
secondary references would not be compatible with a snow plow
structure misses the mark in that one of ordinary skill in the
art would recognize that a different size and type of leading
edge is appropriate for a sidewalk or driveway clearing snow plow
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