P.L. Robertson

Peter Lymburner Robertson (1879-1951) invented the square-drive screw, first produced in his Milton factory in 1908. And wrote The Gold Standard, a book advocating gold-backed money.

The Robertson factory is still operating today.

Missing image
Canada_flag_large.png

This Canadian biographical article is a stub. You can help Wikipedia by expanding it.

See also: P.L. Robertson, 1879, 1951, Biography, Canada, Gold standard, Inventor, Milton, Ontario, Robertson screwdriver