What is the significance of the first-listed CPC symbol in a patent application?
The first-listed CPC symbol in a patent application holds special significance. As stated in MPEP 909.01(a): “The first-listed CPC symbol is considered the controlling classification. The controlling classification generally determines the art unit to which the application will be routed for examination.” The importance of the first-listed CPC symbol includes: Determining the primary art unit…
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