His grandfather invented the electric vaporizer.

My grandfather invented a specific process for creating a certain kind of moire brocade that is still ours alone.

It runs as follows: At the age of eighty your grandfather invents a time machine.

My grandfather invented it eight years ago, but we've never been allowed to use it.

("Oh yes, I know it; my grandfather invented it!")

She has a pilot's license and synesthesia, and her grandfather invented the backless vest.

My great grandfather invented the Crays.

Her maternal grandfather, the late Fessenden Seaver Blanchard, invented platform tennis.

His grandfather, for whom he was named, invented the perforated, oil-filled cylinder that made the Burroughs adding machine add and invariably get the right answer.

In Iraq, she said, "I'm finding another population very much like the people who needed a dialysis machine when my grandfather invented it."