In 1554 he was granted a 20 year patent by Mary Tudor to mine, melt and separate metals; this gave him an exclusive right for 6 years.
This gave him an exclusive right for 6 years. In 1554 he was granted a 20 year patent by Mary Tudor to mine, melt and separate metals.
In 1554 he was granted a 20 year patent by Mary Tudor to mine, melt and separate metals. This gave him an exclusive right for 6 years.
In 1554 he was granted a 20 year patent by Mary Tudor to mine, melt and separate metals. This gave him an exclusive right for 6 years.