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| | Class Definition for Class 420 - ALLOYS OR METALLIC COMPOSITIONS |
 | | Note that Class 420 is superior and thus when both Class 420 claims to an alloy, or metallic composition, per se, and Class 148 process claims are present in the same patent, the original is placed in Class 420 with cross-reference in Class 148. |
 | | Class 420, however, provides for alloys or metallic compositions defined only as "magnetic", "magnetized", or "permanent magnet" material even though disclosed as resulting from a Class 148 treatment as well as alloys, or magnetic compositions claimed, per se, which are inherently magnetic. |
 | | This class (420) however, provides for an alloy, or metallic composition, per se, which is a barrier layer composition; subclasses 62.51+ for magnetic compositions. |
| www.uspto.gov /go/classification/uspc420/defs420.htm (4570 words) |
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