1885, 1892, 1894
In order for an invention to be patented, it must be cost efficient and effective. If the invention does not work, it cannot be patented.
William Payne - painter - died in 1830.
William Collins - painter - was born in 1788.
William Collins - painter - died in 1847.
William Green - painter - was born in 1760.
William Green - painter - died in 1823.
William Bennett - painter - was born in 1811.
William Sadler - painter - was born in 1782.
William Sadler - painter - died in 1839.
William Alexander - painter - died in 1816.
William Alexander - painter - was born in 1767.
William Burgess - painter - died in 1812.