发明授权
US4634635A Black ornament 失效
黑色装饰品

Black ornament
摘要:
An ornament coated with silicon carbide having black luster which has been formed by chemical vapor deposition aided by D.C. glow discharge using hydrogen, a silicon compound and a hydrocarbon.The black ornament according to the present invention is very suitable for a case of a watch, a frame of eyeglasses and so on.
信息查询
0/0