Walter Sylvester (18 December 1867 – 30 October 1944) was an English inventor, known for the "Sylvester", a device for safely removing pit props in mines.
Walter Sylvester (18 December 1867 – 30 October 1944) was an English inventor, known for the "Sylvester", a device for safely removing pit props in mines. (en)
Walter Sylvester (18 December 1867 – 30 October 1944) was an English inventor, known for the "Sylvester", a device for safely removing pit props in mines. (en)