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of Yoker, Glasgow, makers of propellor and other castings from bronze, Bull's metal, melloid and other malleable bronze alloys,
1898 Whilst working for Phosphor Bronze Co Ltd, Mr Bull had been granted patents on Bull's metal; he left the company after making an agreement with them to buy from them the benefit of all orders relating to Bull's metal and melloid. Mr Bull sold the patents to Bulls Metal and Melloid Co who challenged (in 1899) Phosphor Bronze Co about infringing the agreement.
1901 A hearing of the legal action brought by Phosphor Bronze Co Ltd against Bulls Metal and Melloid Co, in which it was decided that the agreement regarding melloid meant that this was pure copper which had been hot rolled; it was decided that Phosphor Bronze Co must have been using cold rolling and therefore did not infringe the agreement; decision in favour of the plaintiffs.
1908 Proponent of solid metal propellors.
1937 Brass and bronze founders and rollers. "Bull's" White Metals. "Melloid" Bronze for Castings and Tubes. 
1952 Orders for sidelights and windows for 5 ships to be made in Belgium.
By 1957 had changed name to Bull's Metal and Marine, makers of propellers and ship windows, which was owned by J. Stone and Co (Holdings) Ltd.