Search Results for: Jewellery of base metal clad with precious metal
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salt (class / ) group ia metal-containing active material (e.g., li, na, k, etc.)
or heating or cooling (class / ) depositing predominantly single metal or alloy coating on single metal or alloy using specified waveform other than pure dc (class / ) depositing predominantly single metal or alloy coating on nonmetal using specified waveform other than pure dc or hz sine wave ac (e.g...
https://patents.justia.com/patents-by-us-classification/205