Show PATENTS RECENTLY ISSUED reported specially for this th is paper by R W bishop patent attorney washington D C apparatus for obtaining sulphur from furnace gases F R carpenter denver colo assignor of one half to A H C H and M H carpenter same place process for manufacture of cyanide of potassium F W morris victoria canada self tightening rock drill chuck chuch J A thompson E X T mackie machle and P F doyle chicago ill assignors assigners assign ors to chicago pneumatic tool company of new jersey pulverizing mill G E lola iola kan and rock drilling machinery henry hellman and L C dayles bayles johannesburg transvaal concentrator J R capps middletown cal stamp mill F I 1 matthews oakland cal assignor to oakland stamp mill company same place |