Specifically the Clarksfield processors from 2009: https://en.wikipedia.org/wiki/Clarksfield_(microprocessor)
Predating the i7 entirely, there were also quad core laptops using Core 2 Quad CPUs (Penryn QC) in 2008.
Predating the i7 entirely, there were also quad core laptops using Core 2 Quad CPUs (Penryn QC) in 2008.