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Class Information
Number: 420/521
Name: Alloys or metallic compositions > Zinc base > Copper containing
Description: Alloy, or metallic composition which additionally contains copper.










Sub-classes under this class:

Class Number Class Name Patents
420/522 Manganese, iron, cobalt, or nickel containing 2


Patents under this class:

Patent Number Title Of Patent Date Issued
7910512 Production process of electrode catalyst for fuel cell Mar. 22, 2011
6074494 Surface nitriding method of an aluminum material, and an auxiliary agent for nitriding Jun. 13, 2000
5658401 Copper-zinc alloy Aug. 19, 1997
5137685 Machinable copper alloys having reduced lead content Aug. 11, 1992
5039479 Silver alloy compositions, and master alloy compositions therefor Aug. 13, 1991
4451541 Soldering composition and method of use May. 29, 1984
4094671 Gold color copper alloy for restorative dentistry Jun. 13, 1978











 
 
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