Peter Lymburner Robertson (1879-1951) is a Canadian inventor of the square-drive screw, first produced in his Milton, Ontario factory in 1908. Peter also wrote The Gold Standard, a book advocating gold-backed money.
Peter Lymburner Robertson (1879-1951) is a Canadian inventor of the square-drive screw, first produced in his Milton, Ontario factory in 1908. Peter also wrote The Gold Standard, a book advocating gold-backed money.
