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Class Information
Number: 524/927
Name: Synthetic resins or natural rubbers -- part of the class 520 series > Natural rubber compositions having nonreactive materials (dnrm) other than: carbon, silicon dioxide, glass titanium dioxide, water, hydrocarbon, halohydrocarbon > With water as nrm, exemplified > Before 1930
Description: Subject matter wherein the patent is before 1930.


Patents under this class:

Patent Number Title Of Patent Date Issued



 
 
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