Search Results for: Jewellery articles of precious metal
salt (class / ) group ia metal-containing active material (e.g., li, na, k, etc.)
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., single metal or alloy coating within or above pores of anodic oxide...
https://patents.justia.com/patents-by-us-classification/205